{"id":2625,"date":"2025-09-11T02:44:18","date_gmt":"2025-09-11T02:44:18","guid":{"rendered":"https:\/\/flj-pcb.com\/?page_id=2625"},"modified":"2025-09-26T05:34:01","modified_gmt":"2025-09-26T05:34:01","slug":"single-sided-pcb","status":"publish","type":"page","link":"https:\/\/flj-pcb.com\/vi\/pcb-manufacturer\/single-sided-pcb\/","title":{"rendered":"B\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t l\u00e0 g\u00ec?"},"content":{"rendered":"
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B\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t l\u00e0 lo\u1ea1i b\u1ea3ng m\u1ea1ch in c\u01a1 b\u1ea3n nh\u1ea5t. T\u1ea5t c\u1ea3 c\u00e1c linh ki\u1ec7n \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t tr\u00ean m\u1ed9t m\u1eb7t. T\u1ea5t c\u1ea3 c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch n\u1eb1m \u1edf m\u1eb7t c\u00f2n l\u1ea1i. V\u00ec ch\u1ec9 c\u00f3 m\u1ed9t m\u1eb7t c\u00f3 \u0111\u01b0\u1eddng m\u1ea1ch, n\u00ean ch\u00fang ta g\u1ecdi n\u00f3 l\u00e0 b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t. Lo\u1ea1i b\u1ea3ng m\u1ea1ch n\u00e0y d\u1ec5 s\u1ea3n xu\u1ea5t v\u00e0 c\u00f3 chi ph\u00ed th\u1ea5p h\u01a1n. Ch\u00ednh v\u00ec l\u00fd do \u0111\u00f3, c\u00e1c s\u1ea3n ph\u1ea9m \u0111i\u1ec7n t\u1eed \u0111\u01a1n gi\u1ea3n th\u01b0\u1eddng s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t.<\/p>

\"Single-sided<\/p>

Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch in hai m\u1eb7t<\/h2>

B\u1ea3ng m\u1ea1ch in hai m\u1eb7t l\u00e0 m\u1ed9t b\u01b0\u1edbc ti\u1ebfn so v\u1edbi b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t. Khi m\u1ed9t l\u1edbp \u0111\u01b0\u1eddng d\u1eabn kh\u00f4ng th\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u c\u1ee7a s\u1ea3n ph\u1ea9m, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf s\u1ebd s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch in hai m\u1eb7t. C\u1ea3 hai m\u1eb7t \u0111\u1ec1u c\u00f3 l\u1edbp \u0111\u1ed3ng v\u00e0 \u0111\u01b0\u1eddng d\u1eabn. Hai m\u1eb7t c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi nhau th\u00f4ng qua c\u00e1c l\u1ed7 m\u1ea1 \u0111i\u1ec7n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 vias. C\u00e1c vias cho ph\u00e9p t\u00edn hi\u1ec7u di chuy\u1ec3n t\u1eeb l\u1edbp n\u00e0y sang l\u1edbp kia. Nh\u1edd \u0111\u00f3, b\u1ea3ng m\u1ea1ch c\u00f3 th\u1ec3 t\u1ea1o th\u00e0nh m\u1ea1ng m\u1ea1ch c\u1ea7n thi\u1ebft.<\/p>

\u0110i\u1ec3m gi\u1ed1ng v\u00e0 kh\u00e1c nhau gi\u1eefa b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t v\u00e0 hai m\u1eb7t<\/h2>

V\u1eadt li\u1ec7u v\u00e0 quy tr\u00ecnh c\u01a1 b\u1ea3n<\/h3>

B\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t v\u00e0 hai m\u1eb7t \u0111\u1ec1u s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u c\u01a1 b\u1ea3n. H\u1ea7u h\u1ebft c\u00e1c b\u1ea3ng m\u1ea1ch hi\u1ec7n \u0111\u1ea1i \u0111\u1ec1u s\u1eed d\u1ee5ng FR4. FR4 l\u00e0 h\u1ed7n h\u1ee3p c\u1ee7a s\u1ee3i th\u1ee7y tinh v\u00e0 nh\u1ef1a epoxy. Trong quy tr\u00ecnh s\u1ea3n xu\u1ea5t hi\u1ec7n \u0111\u1ea1i, ng\u01b0\u1eddi ta th\u01b0\u1eddng m\u1ea1 \u0111\u1ed3ng l\u00ean b\u1ec1 m\u1eb7t b\u1ea3ng m\u1ea1ch \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n t\u1ed1t. Sau \u0111\u00f3, ng\u01b0\u1eddi ta ph\u1ee7 m\u1ed9t l\u1edbp m\u00e0ng ch\u1ed1ng h\u00e0n \u0111\u1ec3 t\u1ea1o v\u1ebb ngo\u00e0i g\u1ecdn g\u00e0ng v\u00e0 b\u1ea3o v\u1ec7 b\u1ea3ng m\u1ea1ch. C\u00e1c nh\u00e3n v\u00e0 k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c in l\u00ean b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p in l\u1ee5a. C\u00e1c m\u00e1y m\u00f3c in c\u00e1c k\u00fd hi\u1ec7u n\u00e0y th\u00f4ng qua quy tr\u00ecnh g\u1ecdi l\u00e0 in l\u1ee5a.<\/p>

C\u00e1c ph\u01b0\u01a1ng ph\u00e1p s\u1ea3n xu\u1ea5t c\u0169 v\u00e0 nh\u1eefng h\u1ea1n ch\u1ebf<\/h3>

Quy tr\u00ecnh s\u1ea3n xu\u1ea5t b\u1ea3ng m\u1ea1ch hi\u1ec7n \u0111\u1ea1i kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng nh\u01b0 v\u1eady. Tr\u01b0\u1edbc \u0111\u00e2y, c\u00e1c k\u1ef9 s\u01b0 v\u00e0 ng\u01b0\u1eddi \u0111am m\u00ea th\u01b0\u1eddng v\u1ebd b\u1ea3n thi\u1ebft k\u1ebf l\u00ean b\u1ea3ng m\u1ea1ch r\u1ed3i t\u1ef1 tay \u0103n m\u00f2n ch\u00fang b\u1eb1ng dung d\u1ecbch h\u00f3a ch\u1ea5t. C\u00f3 r\u1ea5t nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau, nh\u01b0ng h\u1ea7u h\u1ebft \u0111\u1ec1u g\u1eb7p ph\u1ea3i nh\u1eefng h\u1ea1n ch\u1ebf t\u01b0\u01a1ng t\u1ef1. Ng\u01b0\u1eddi ta kh\u00f4ng th\u1ec3 d\u1ec5 d\u00e0ng \u0103n m\u00f2n nhi\u1ec1u l\u1edbp tr\u00ean c\u00f9ng m\u1ed9t b\u1ea3ng m\u1ea1ch. \u0110i\u1ec1u n\u00e0y bu\u1ed9c c\u00e1c b\u1ea3n thi\u1ebft k\u1ebf ph\u1ea3i c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n v\u00e0 \u0111\u00f2i h\u1ecfi ph\u1ea3i t\u1ed1i \u01b0u h\u00f3a k\u1ef9 l\u01b0\u1ee1ng.<\/p>

V\u00e0o nh\u1eefng n\u0103m 1960, \u0111i\u1ec1u n\u00e0y ho\u00e0n to\u00e0n \u1ed5n. C\u00e1c linh ki\u1ec7n l\u1ed7 th\u00f4ng l\u1edbn l\u00e0 ti\u00eau chu\u1ea9n ph\u1ed5 bi\u1ebfn. C\u00e1c chip h\u00ecnh ch\u1eef nh\u1eadt c\u1ee1 l\u1edbn c\u00f3 ch\u00e2n c\u1eafm r\u1ed9ng. \u0110\u00f3 l\u00e0 c\u00e1c g\u00f3i DIP. C\u00e1c linh ki\u1ec7n r\u1eddi l\u1ed7 th\u00f4ng nh\u01b0 \u0111i\u1ec7n tr\u1edf v\u00e0 t\u1ee5 \u0111i\u1ec7n c\u0169ng c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn. C\u00e1c linh ki\u1ec7n \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed s\u00e1t nhau n\u00ean vi\u1ec7c thi\u1ebft k\u1ebf c\u00e1c \u0111\u01b0\u1eddng d\u1eabn ng\u1eafn r\u1ea5t d\u1ec5 d\u00e0ng. \u0110i\u1ec1u \u0111\u00f3 gi\u00fap cho vi\u1ec7c b\u1ed1 tr\u00ed m\u1ea1ch m\u1ed9t m\u1eb7t tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n v\u00e0 r\u00f5 r\u00e0ng.<\/p>

S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb g\u1eafn b\u1ec1 m\u1eb7t (SMD)<\/h3>

Th\u1eadp ni\u00ean 1980 \u0111\u00e3 thay \u0111\u1ed5i to\u00e0n b\u1ed9 l\u0129nh v\u1ef1c n\u00e0y. C\u00e1c thi\u1ebft b\u1ecb g\u1eafn b\u1ec1 m\u1eb7t (SMD) tr\u1edf th\u00e0nh linh ki\u1ec7n \u0111\u01b0\u1ee3c c\u00e1c k\u1ef9 s\u01b0 \u01b0a chu\u1ed9ng. C\u00e1c g\u00f3i ph\u1eb3ng h\u00ecnh vu\u00f4ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn. C\u00e1c linh ki\u1ec7n r\u1eddi SMD khi\u1ebfn vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn d\u01b0\u1edbi c\u00e1c linh ki\u1ec7n tr\u1edf n\u00ean kh\u00f3 kh\u0103n. C\u00e1c b\u1ea3ng m\u1ea1ch ph\u1ea3i nh\u1ecf h\u01a1n. C\u00e1c b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t tr\u1edf n\u00ean kh\u00f3 s\u1eed d\u1ee5ng h\u01a1n. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a k\u1ef9 thu\u1eadt b\u1ea3ng m\u1ea1ch hai m\u1eb7t. V\u1edbi c\u00e1c l\u1ed7 vias, b\u1ea1n kh\u00f4ng c\u00f2n ph\u1ea3i gi\u1eef t\u1ea5t c\u1ea3 \u0111\u1ed3ng \u1edf c\u00f9ng m\u1ed9t m\u1eb7t n\u1eefa. B\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ecbnh tuy\u1ebfn \u1edf c\u1ea3 hai m\u1eb7t v\u1edbi c\u00e1c l\u1ed7 m\u1ea1 k\u1ebft n\u1ed1i c\u00e1c l\u1edbp.<\/p>

\"surface-mount<\/p>

B\u1ea3ng m\u1ea1ch in hai m\u1eb7t<\/h2>

C\u00e1c k\u1ef9 s\u01b0 chuy\u1ec3n sang s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch hai m\u1eb7t ch\u1ee7 y\u1ebfu v\u00ec t\u00ednh ti\u1ec7n l\u1ee3i. Khi c\u00e1c gi\u1edbi h\u1ea1n thi\u1ebft k\u1ebf bu\u1ed9c c\u00e1c linh ki\u1ec7n ph\u1ea3i n\u1eb1m trong m\u1ed9t khu v\u1ef1c nh\u1ea5t \u0111\u1ecbnh, vi\u1ec7c b\u1ed1 tr\u00ed m\u1ea1ch hai m\u1eb7t s\u1ebd d\u1ec5 d\u00e0ng h\u01a1n so v\u1edbi m\u1ea1ch m\u1ed9t m\u1eb7t. B\u1ea3ng m\u1ea1ch hai m\u1eb7t c\u0169ng cho ph\u00e9p t\u1ea1o ra c\u00e1c v\u00f9ng n\u1ed1i \u0111\u1ea5t ho\u1eb7c ngu\u1ed3n \u0111i\u1ec7n c\u00f3 di\u1ec7n t\u00edch l\u1edbn. N\u1ebfu quan s\u00e1t k\u1ef9 m\u1ed9t b\u1ea3ng m\u1ea1ch, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y nh\u1eefng v\u00f9ng \u0111\u1ed3ng r\u1ed9ng l\u1edbn thay v\u00ec nhi\u1ec1u \u0111\u01b0\u1eddng d\u1eabn m\u1ecfng. Nh\u1eefng v\u00f9ng \u0111\u1ed3ng r\u1ed9ng n\u00e0y gi\u00fap c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI), t\u1ea3n nhi\u1ec7t, kh\u1ea3 n\u0103ng s\u1ea3n xu\u1ea5t, v\u00e0 quan tr\u1ecdng nh\u1ea5t l\u00e0 gi\u00fap gi\u1ea3m b\u1edbt c\u00f4ng vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn.<\/p>

T\u1ea1i sao b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t v\u1eabn c\u00f2n t\u1ed3n t\u1ea1i<\/h2>

M\u1eb7c d\u00f9 b\u1ea3ng m\u1ea1ch hai m\u1eb7t c\u00f3 nh\u1eefng l\u1ee3i \u00edch r\u00f5 r\u00e0ng, nh\u01b0ng thi\u1ebft k\u1ebf m\u1ed9t m\u1eb7t v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u s\u1ea3n ph\u1ea9m hi\u1ec7n nay. Chi ph\u00ed l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh ch\u00ednh. PCB m\u1ed9t m\u1eb7t th\u01b0\u1eddng c\u00f3 gi\u00e1 mua th\u1ea5p h\u01a1n m\u1ed9t ch\u00fat v\u00e0 \u0111\u00f4i khi c\u00f3 th\u1eddi gian giao h\u00e0ng ng\u1eafn h\u01a1n. \u0110\u1ed1i v\u1edbi m\u1ed9t thi\u1ebft k\u1ebf \u0111\u01a1n gi\u1ea3n, \u0111\u00f3 l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf r\u00f5 r\u00e0ng. Trong s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u01a1n gi\u1ea3n, vi\u1ec7c ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c v\u00e0i xu cho m\u1ed7i b\u1ea3ng m\u1ea1ch c\u00f3 th\u1ec3 r\u1ea5t quan tr\u1ecdng. Ngo\u00e0i ra, \u0111\u1ed1i v\u1edbi c\u00e1c \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n cao c\u1ea7n \u0111\u1ed3ng r\u1ed9ng, b\u1ed1 c\u1ee5c m\u1ed9t m\u1eb7t c\u00f3 th\u1ec3 l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p. Ch\u00fang cho ph\u00e9p b\u1ea1n s\u1eed d\u1ee5ng c\u00e1c khu v\u1ef1c \u0111\u1ed3ng r\u1ed9ng v\u00e0 \u0111\u1ecbnh tuy\u1ebfn \u0111\u01a1n gi\u1ea3n cho c\u00e1c \u0111\u01b0\u1eddng d\u1eabn d\u00f2ng \u0111i\u1ec7n m\u1ea1nh.<\/p>

\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t<\/h3>

\u01afu \u0111i\u1ec3m<\/h3>

  • Chi ph\u00ed th\u1ea5p h\u01a1n.<\/p><\/li>

  • Thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t \u0111\u01a1n gi\u1ea3n h\u01a1n.<\/p><\/li>

  • Th\u1eddi gian th\u1ef1c hi\u1ec7n ng\u1eafn h\u01a1n trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p.<\/p><\/li><\/ul>

    Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/h3>

    • Kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft k\u1ebf ph\u1ee9c t\u1ea1p c\u00f3 nhi\u1ec1u b\u1ed9 ph\u1eadn.<\/p><\/li>

    • Kh\u00f3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc nh\u1ecf.<\/p><\/li>

    • Dung l\u01b0\u1ee3ng \u0111\u1ecbnh tuy\u1ebfn th\u1ea5p h\u01a1n.<\/p><\/li>

    • C\u00f3 th\u1ec3 n\u1eb7ng v\u00e0 to h\u01a1n d\u00f9 c\u00f3 c\u00f9ng ch\u1ee9c n\u0103ng.<\/p><\/li><\/ul>

      C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh c\u1ee7a b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t<\/h2>

      B\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u s\u1ea3n ph\u1ea9m gi\u00e1 r\u1ebb. Ch\u00fang xu\u1ea5t hi\u1ec7n trong c\u00e1c thi\u1ebft b\u1ecb c\u00f3 ch\u1ee9c n\u0103ng \u0111\u01a1n gi\u1ea3n, kh\u00f4ng c\u1ea7n b\u1ed9 nh\u1edb l\u1edbn hay k\u1ebft n\u1ed1i m\u1ea1ng. V\u00ed d\u1ee5 nh\u01b0 c\u00e1c thi\u1ebft b\u1ecb gia d\u1ee5ng nh\u1ecf nh\u01b0 m\u00e1y pha c\u00e0 ph\u00ea. Ch\u00fang c\u0169ng xu\u1ea5t hi\u1ec7n trong nhi\u1ec1u lo\u1ea1i m\u00e1y t\u00ednh c\u1ea7m tay, radio \u0111\u01a1n gi\u1ea3n, m\u00e1y in v\u00e0 \u0111\u00e8n LED. C\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef \u0111\u01a1n gi\u1ea3n nh\u01b0 \u1ed5 c\u1ee9ng th\u1ec3 r\u1eafn c\u01a1 b\u1ea3n c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t. B\u1ed9 ngu\u1ed3n v\u00e0 nhi\u1ec1u lo\u1ea1i c\u1ea3m bi\u1ebfn c\u0169ng th\u01b0\u1eddng s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t.<\/p>

      C\u00e1ch ph\u00e2n bi\u1ec7t b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t, hai m\u1eb7t v\u00e0 nhi\u1ec1u l\u1edbp<\/h2>

      1. Gi\u1eef t\u1ea5m m\u1ea1ch g\u1ea7n ngu\u1ed3n s\u00e1ng. N\u1ebfu l\u00f5i b\u00ean trong ho\u00e0n to\u00e0n kh\u00f4ng trong su\u1ed1t v\u00e0 b\u1ea1n kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y \u00e1nh s\u00e1ng xuy\u00ean qua c\u00e1c l\u1edbp b\u00ean trong, \u0111\u00f3 l\u00e0 t\u1ea5m m\u1ea1ch nhi\u1ec1u l\u1edbp. N\u1ebfu b\u1ea1n ch\u1ec9 nh\u00ecn th\u1ea5y m\u1ed9t l\u1edbp \u0111\u1ed3ng, \u0111\u00f3 l\u00e0 t\u1ea5m m\u1ea1ch m\u1ed9t m\u1eb7t.<\/p><\/li>

      2. H\u00e3y nh\u00ecn v\u00e0o c\u00e1c l\u1ed7. C\u00e1c b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t c\u00f3 c\u00e1c l\u1ed7 kh\u00f4ng \u0111\u01b0\u1ee3c m\u1ea1. Th\u00e0nh l\u1ed7 c\u1ee7a ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c m\u1ea1 v\u00e0 qu\u00e1 tr\u00ecnh m\u1ea1 \u0111i\u1ec7n c\u0169ng \u0111\u01b0\u1ee3c b\u1ecf qua. C\u00e1c b\u1ea3ng m\u1ea1ch hai m\u1eb7t c\u00f3 c\u00e1c l\u1ed7 xuy\u00ean qua \u0111\u01b0\u1ee3c m\u1ea1 ho\u1eb7c c\u00e1c l\u1ed7 vias. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n s\u1ebd th\u1ea5y \u0111\u1ed3ng b\u00ean trong l\u1ed7.<\/p><\/li>

      3. S\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n n\u1eb1m \u1edf s\u1ed1 l\u01b0\u1ee3ng l\u1edbp \u0111\u1ed3ng: m\u1ea1ch \u0111\u01a1n c\u00f3 m\u1ed9t l\u1edbp \u0111\u1ed3ng, m\u1ea1ch \u0111\u00f4i c\u00f3 hai l\u1edbp \u0111\u1ed3ng, c\u00f2n m\u1ea1ch \u0111a l\u1edbp c\u00f3 ba l\u1edbp tr\u1edf l\u00ean. Trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t m\u1ea1ch \u0111a l\u1edbp, c\u00e1c l\u1edbp b\u00ean trong \u0111\u01b0\u1ee3c th\u00eam v\u00e0o tr\u01b0\u1edbc, sau \u0111\u00f3 to\u00e0n b\u1ed9 c\u1ea5u tr\u00fac \u0111\u01b0\u1ee3c \u00e9p d\u00ednh l\u1ea1i v\u1edbi nhau. N\u1ebfu c\u1ea7n, b\u1ea1n c\u00f3 th\u1ec3 c\u1eaft m\u1ed9t m\u1eb7t c\u1eaft ngang \u0111\u1ec3 ki\u1ec3m tra c\u00e1c l\u1edbp.<\/p><\/li><\/ol>

        \"double-sided<\/p>

        C\u00e1ch gi\u1ea3m nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) tr\u00ean b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t ho\u1eb7c hai m\u1eb7t<\/h2>

        V\u00ec l\u00fd do chi ph\u00ed, nhi\u1ec1u thi\u1ebft b\u1ecb ti\u00eau d\u00f9ng s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t ho\u1eb7c hai m\u1eb7t. Khi c\u00e1c m\u1ea1ch xung k\u1ef9 thu\u1eadt s\u1ed1 ng\u00e0y c\u00e0ng ph\u1ed5 bi\u1ebfn, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) c\u0169ng gia t\u0103ng. Nguy\u00ean nh\u00e2n ch\u00ednh l\u00e0 do di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p t\u00edn hi\u1ec7u l\u1edbn. Di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p l\u1edbn kh\u00f4ng ch\u1ec9 ph\u00e1t ra b\u1ee9c x\u1ea1 m\u1ea1nh h\u01a1n m\u00e0 c\u00f2n khi\u1ebfn m\u1ea1ch nh\u1ea1y c\u1ea3m h\u01a1n v\u1edbi nhi\u1ec5u t\u1eeb b\u00ean ngo\u00e0i. \u0110\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch \u0111i\u1ec7n t\u1eeb (EMC), c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u01a1n gi\u1ea3n nh\u1ea5t l\u00e0 gi\u1ea3m di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p c\u1ee7a c\u00e1c t\u00edn hi\u1ec7u quan tr\u1ecdng.<\/p>

        X\u00e1c \u0111\u1ecbnh c\u00e1c t\u00edn hi\u1ec7u quan tr\u1ecdng<\/h3>

        T\u1eeb g\u00f3c \u0111\u1ed9 EMC, c\u00e1c t\u00edn hi\u1ec7u ch\u00ednh bao g\u1ed3m nh\u1eefng t\u00edn hi\u1ec7u ph\u00e1t ra b\u1ee9c x\u1ea1 m\u1ea1nh v\u00e0 nh\u1eefng t\u00edn hi\u1ec7u nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec5u t\u1eeb b\u00ean ngo\u00e0i. C\u00e1c ngu\u1ed3n ph\u00e1t b\u1ee9c x\u1ea1 m\u1ea1nh th\u01b0\u1eddng l\u00e0 c\u00e1c t\u00edn hi\u1ec7u c\u00f3 t\u00ednh chu k\u1ef3, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 v\u00e0 c\u00e1c \u0111\u01b0\u1eddng \u0111\u1ecba ch\u1ec9 b\u1eadc th\u1ea5p. C\u00e1c t\u00edn hi\u1ec7u nh\u1ea1y c\u1ea3m th\u01b0\u1eddng l\u00e0 c\u00e1c \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 m\u1ee9c th\u1ea5p.<\/p>

        C\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3m di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p<\/h3>

        M\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111\u01a1n gi\u1ea3n l\u00e0 b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea5t ngay b\u00ean c\u1ea1nh \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u. H\u00e3y \u0111\u1eb7t \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea5t c\u00e0ng g\u1ea7n c\u00e0ng t\u1ed1t. C\u00e1ch b\u1ed1 tr\u00ed n\u00e0y t\u1ea1o ra di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p r\u1ea5t nh\u1ecf, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u b\u1ee9c x\u1ea1 vi sai v\u00e0 \u0111\u1ed9 nh\u1ea1y. Khi b\u1ea1n th\u00eam \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea5t b\u00ean c\u1ea1nh \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u, d\u00f2ng \u0111i\u1ec7n t\u00edn hi\u1ec7u s\u1ebd ch\u1ee7 y\u1ebfu ch\u1ea1y trong v\u00f2ng l\u1eb7p nh\u1ecf \u0111\u00f3, ch\u1ee9 kh\u00f4ng ch\u1ea1y qua c\u00e1c \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea5t kh\u00e1c.<\/p>

        N\u1ebfu b\u1ea1n s\u1eed d\u1ee5ng b\u1ea3ng m\u1ea1ch hai m\u1eb7t, h\u00e3y \u0111\u1eb7t m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn n\u1ed1i \u0111\u1ea5t \u1edf m\u1eb7t b\u00ean kia, ngay d\u01b0\u1edbi \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u. N\u1ebfu c\u00f3 th\u1ec3, h\u00e3y l\u00e0m cho \u0111\u01b0\u1eddng d\u1eabn n\u1ed1i \u0111\u1ea5t \u0111\u00f3 r\u1ed9ng nh\u1ea5t c\u00f3 th\u1ec3. Khi \u0111\u00f3, di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p s\u1ebd b\u1eb1ng \u0111\u1ed9 d\u00e0y c\u1ee7a b\u1ea3ng m\u1ea1ch nh\u00e2n v\u1edbi chi\u1ec1u d\u00e0i c\u1ee7a \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u. Di\u1ec7n t\u00edch n\u00e0y nh\u1ecf h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ed9t v\u00f2ng l\u1eb7p h\u1edf d\u00e0i v\u00e0 gi\u00fap gi\u1ea3m thi\u1ec3u s\u1ef1 b\u1ee9c x\u1ea1.<\/p>

        Ngo\u00e0i ra, h\u00e3y lu\u00f4n s\u1eed d\u1ee5ng l\u01b0\u1edbi \u0111\u1ed3ng n\u1ed1i \u0111\u1ea5t tr\u00ean c\u00e1c b\u1ea3ng m\u1ea1ch hai m\u1eb7t. L\u01b0\u1edbi n\u1ed1i \u0111\u1ea5t gi\u00fap gi\u1ea3m tr\u1edf kh\u00e1ng n\u1ed1i \u0111\u1ea5t. V\u1edbi l\u01b0\u1edbi n\u1ed1i \u0111\u1ea5t, \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u h\u1ea7u nh\u01b0 lu\u00f4n c\u00f3 \u0111\u01b0\u1eddng n\u1ed1i \u0111\u1ea5t \u1edf g\u1ea7n v\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t v\u00f9ng v\u00f2ng l\u1eb7p nh\u1ecf h\u01a1n. Khi b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng m\u1ea1ch, h\u00e3y gi\u1eef c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch quan tr\u1ecdng g\u1ea7n v\u1edbi \u0111\u01b0\u1eddng n\u1ed1i \u0111\u1ea5t. Ch\u1ec9 nh\u1eefng \u0111\u01b0\u1eddng m\u1ea1ch quan tr\u1ecdng nh\u1ea5t m\u1edbi c\u1ea7n c\u00f3 \u0111\u01b0\u1eddng n\u1ed1i \u0111\u1ea5t ngay b\u00ean c\u1ea1nh.<\/p>

        M\u1ed9t s\u1ed1 l\u1eddi khuy\u00ean c\u01a1 b\u1ea3n kh\u00e1c:<\/p>

        • N\u00ean s\u1eed d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng d\u1eabn ng\u1eafn cho t\u00edn hi\u1ec7u t\u1ed1c \u0111\u1ed9 cao.<\/p><\/li>

        • S\u1eed d\u1ee5ng t\u1ee5 \u0111i\u1ec7n c\u00e1ch ly ph\u00f9 h\u1ee3p g\u1ea7n c\u00e1c ch\u00e2n c\u1ea5p ngu\u1ed3n.<\/p><\/li>

        • H\u00e3y gi\u1eef cho c\u00e1c \u0111\u01b0\u1eddng n\u1ed1i \u0111\u1ea5t analog v\u00e0 k\u1ef9 thu\u1eadt s\u1ed1 t\u00e1ch bi\u1ec7t, sau \u0111\u00f3 n\u1ed1i ch\u00fang l\u1ea1i v\u1edbi nhau t\u1ea1i m\u1ed9t \u0111i\u1ec3m duy nh\u1ea5t n\u1ebfu c\u1ea7n thi\u1ebft.<\/p><\/li>

        • Tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c v\u00f2ng l\u1eb7p d\u00e0i. N\u00ean b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng d\u1eabn tr\u1edf v\u1ec1 g\u1ea7n \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u.<\/p><\/li><\/ul>

          M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/h2>

          • \u0110\u1ed1i v\u1edbi \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 tr\u00ean b\u1ea3ng m\u1ea1ch hai m\u1eb7t, h\u00e3y \u0111\u1eb7t m\u1ed9t \u0111\u01b0\u1eddng d\u1eabn n\u1ed1i \u0111\u1ea5t r\u1ed9ng \u1edf ph\u00eda b\u00ean kia. N\u1ebfu \u0111\u1ed9 d\u00e0y b\u1ea3ng m\u1ea1ch l\u00e0 1,6 mm v\u00e0 \u0111\u01b0\u1eddng d\u1eabn t\u00edn hi\u1ec7u \u0111\u1ed3ng h\u1ed3 d\u00e0i 50 mm, di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p s\u1ebd v\u00e0o kho\u1ea3ng 1,6 mm \u00d7 50 mm. N\u1ebfu b\u1ea1n c\u00f3 th\u1ec3 r\u00fat ng\u1eafn \u0111\u01b0\u1eddng d\u1eabn xu\u1ed1ng c\u00f2n 20 mm, di\u1ec7n t\u00edch n\u00e0y s\u1ebd gi\u1ea3m \u0111i \u0111\u00e1ng k\u1ec3.<\/p><\/li>

          • \u0110\u1ed1i v\u1edbi t\u00edn hi\u1ec7u t\u01b0\u01a1ng t\u1ef1 nh\u1ea1y c\u1ea3m, h\u00e3y ch\u1ea1y m\u1ed9t \u0111\u01b0\u1eddng n\u1ed1i \u0111\u1ea5t ngay b\u00ean c\u1ea1nh n\u00f3 tr\u00ean c\u00f9ng m\u1ed9t m\u1eb7t. Khi \u0111\u00f3, c\u1eb7p d\u00e2y n\u00e0y s\u1ebd t\u1ea1o th\u00e0nh m\u1ed9t v\u00f2ng l\u1eb7p k\u00edn v\u00e0 gi\u1ea3m nhi\u1ec5u thu.<\/p><\/li><\/ul>

            T\u00f3m t\u1eaft<\/h2>

            B\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t (PCB) c\u00f3 c\u1ea5u t\u1ea1o \u0111\u01a1n gi\u1ea3n v\u00e0 gi\u00e1 th\u00e0nh r\u1ebb. T\u1ea5t c\u1ea3 c\u00e1c linh ki\u1ec7n \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean m\u1ed9t m\u1eb7t, c\u00f2n c\u00e1c \u0111\u01b0\u1eddng m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed tr\u00ean m\u1eb7t c\u00f2n l\u1ea1i. B\u1ea3ng m\u1ea1ch hai m\u1eb7t c\u00f3 th\u00eam m\u1ed9t l\u1edbp th\u1ee9 hai v\u00e0 s\u1eed d\u1ee5ng c\u00e1c l\u1ed7 vias \u0111\u1ec3 k\u1ebft n\u1ed1i hai m\u1eb7t. FR4 l\u00e0 v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn cho c\u1ea3 hai lo\u1ea1i. S\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1eeb linh ki\u1ec7n l\u1ed7 th\u00f4ng sang linh ki\u1ec7n g\u1eafn b\u1ec1 m\u1eb7t \u0111\u00e3 th\u00fac \u0111\u1ea9y nhu c\u1ea7u v\u1ec1 b\u1ea3ng m\u1ea1ch hai m\u1eb7t v\u00e0 nhi\u1ec1u l\u1edbp. Tuy nhi\u00ean, b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn h\u1ee3p l\u00fd cho nhi\u1ec1u s\u1ea3n ph\u1ea9m \u0111\u01a1n gi\u1ea3n v\u00ec chi ph\u00ed th\u1ea5p v\u00e0 d\u1ec5 s\u1ea3n xu\u1ea5t. \u0110\u1ec3 gi\u1ea3m nhi\u1ec5u \u0111i\u1ec7n t\u1eeb (EMI) tr\u00ean b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t ho\u1eb7c hai m\u1eb7t, h\u00e3y gi\u1ea3m di\u1ec7n t\u00edch v\u00f2ng l\u1eb7p, th\u00eam c\u00e1c \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ea5t g\u1ea7n \u0111\u00f3, s\u1eed d\u1ee5ng l\u01b0\u1edbi \u0111\u1ea5t v\u00e0 gi\u1eef cho c\u00e1c \u0111\u01b0\u1eddng d\u1eabn ng\u1eafn.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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            <\/div>\n\t\t\t\t\t\t\t
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            C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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            \n\t\t\t\t\t\t\t
            \n\t\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tNh\u1eefng \u01b0u \u0111i\u1ec3m ch\u00ednh c\u1ee7a b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t l\u00e0 g\u00ec?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

            Ch\u00fang c\u00f3 chi ph\u00ed th\u1ea5p, thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t \u0111\u01a1n gi\u1ea3n, d\u1ec5 ki\u1ec3m tra\/s\u1eeda ch\u1eefa, v\u00e0 r\u1ea5t ph\u00f9 h\u1ee3p cho c\u00e1c s\u1ea3n ph\u1ea9m s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t v\u1edbi \u0111\u1ed9 ph\u1ee9c t\u1ea1p th\u1ea5p.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

            \n\t\t\t\t\t
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            \u0110\u00fang v\u1eady \u2014 do \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 quy tr\u00ecnh th\u1ea5p h\u01a1n, n\u00ean chi ph\u00ed \u0111\u01a1n v\u1ecb v\u00e0 th\u1eddi gian s\u1ea3n xu\u1ea5t th\u01b0\u1eddng th\u1ea5p h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi c\u00e1c lo\u1ea1i PCB hai m\u1eb7t ho\u1eb7c nhi\u1ec1u l\u1edbp.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

            \n\t\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tC\u00f3 l\u01b0u \u00fd \u0111\u1eb7c bi\u1ec7t n\u00e0o v\u1ec1 vi\u1ec7c l\u1eafp r\u00e1p \u0111\u1ed1i v\u1edbi b\u1ea3ng m\u1ea1ch m\u1ed9t m\u1eb7t kh\u00f4ng?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

            V\u00ec c\u00e1c linh ki\u1ec7n \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed \u1edf m\u1ed9t m\u1eb7t, h\u00e3y l\u00ean k\u1ebf ho\u1ea1ch b\u1ed1 tr\u00ed linh ki\u1ec7n sao cho ph\u00f9 h\u1ee3p v\u1edbi quy tr\u00ecnh h\u00e0n n\u00f3ng ch\u1ea3y\/h\u00e0n s\u00f3ng v\u00e0 \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 linh ki\u1ec7n n\u00e0o c\u1ea3n tr\u1edf \u1edf m\u1eb7t h\u00e0n; h\u00e3y th\u1ea3o lu\u1eadn v\u1ec1 quy tr\u00ecnh h\u00e0n v\u1edbi \u0111\u01a1n v\u1ecb l\u1eafp r\u00e1p c\u1ee7a b\u1ea1n.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

            \n\t\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tC\u00e1c b\u1ea3ng m\u1ea1ch in m\u1ed9t m\u1eb7t \u0111\u01b0\u1ee3c ki\u1ec3m tra nh\u01b0 th\u1ebf n\u00e0o tr\u01b0\u1edbc khi xu\u1ea5t x\u01b0\u1edfng?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

            C\u00e1c b\u01b0\u1edbc ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng (QA) ti\u00eau chu\u1ea9n bao g\u1ed3m ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng, ki\u1ec3m tra b\u1eb1ng h\u1ec7 th\u1ed1ng AOI (n\u1ebfu c\u00f3), ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c \u0111i\u1ec7n v\u00e0 ki\u1ec3m tra ng\u1eafn m\u1ea1ch, c\u0169ng nh\u01b0 ki\u1ec3m tra ch\u1ee9c n\u0103ng khi kh\u00e1ch h\u00e0ng y\u00eau c\u1ea7u.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

            \n\t\t\t\t\t
            \n\t\t\t\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t<\/path><\/svg><\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\tNh\u1eefng nguy\u00ean t\u1eafc thi\u1ebft k\u1ebf n\u00e0o l\u00e0 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi b\u1ed1 c\u1ee5c m\u1ed9t l\u1edbp?<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t

            Tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc ti\u00eau chu\u1ea9n v\u1ec1 kho\u1ea3ng c\u00e1ch v\u00e0 chi\u1ec1u r\u1ed9ng \u0111\u01b0\u1eddng m\u1ea1ch, b\u1ed1 tr\u00ed \u0111\u01b0\u1eddng m\u1ea1ch \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c \u0111i\u1ec3m giao nhau (v\u00ec kh\u00f4ng c\u00f3 l\u1edbp th\u1ee9 hai), v\u00e0 ch\u1eeba kho\u1ea3ng tr\u1ed1ng cho c\u00e1c l\u1ed7 xuy\u00ean v\u00e0 c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac \u2014 x\u00e1c nh\u1eadn c\u00e1c quy t\u1eafc ki\u1ec3m tra thi\u1ebft k\u1ebf (DRC) v\u00e0 c\u00e1c gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u c\u1ee7a nh\u00e0 m\u00e1y s\u1ea3n xu\u1ea5t.<\/p><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

            A single-sided PCB is the most basic printed circuit board. All parts sit on one side. All traces sit on […]<\/p>","protected":false},"author":1,"featured_media":0,"parent":1898,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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            A single-sided PCB is the most basic printed circuit board. All parts sit on one side. All traces sit on the other side. Because only one side has traces, we call it a single-sided board. It is easy to make and it costs less. For that reason, simple electronic products often use single-sided PCBs.<\\\/p>

            \\\"Single-sided<\\\/p>

            When to use a double-sided PCB<\\\/h2>

            A double-sided PCB is a step up from a single-sided board. When one layer of routing cannot meet the needs of a product, designers use a double-sided board. Both sides have copper and traces. The two sides can connect with plated holes called vias. Vias let signals move from one layer to the other. That way the board can form the needed circuit network.<\\\/p>

            Similarities and differences between single-sided and double-sided PCBs<\\\/h2>

            Materials and base process<\\\/h3>

            Single-sided and double-sided PCBs share the same basic material. Most modern boards use fr4. fr4 is a mix of glass fiber and epoxy. In modern making, we usually plate the board with copper for good conductivity. Then we add a solder mask for a neat look and for protection. A silkscreen or screen print adds labels and marks. Machines print the marks in a process called silkscreen.<\\\/p>

            Old manufacturing and limits<\\\/h3>

            Modern board making was not always like this. In the past, engineers and hobbyists exposed designs on boards and then etched them by hand with chemical baths. Many methods existed. Most had the same limits. You could not etch many layers on one board easily. That forced layouts to be larger and to need heavy optimization.<\\\/p>

            In the 1960s this was fine. Large through-hole parts were the norm. Big rectangular chips had wide pins. These were DIP packages. Discrete through-hole parts like resistors and capacitors were large too. Parts laid close together so short traces were easy. That made single-sided layouts simple and clear.<\\\/p>

            The rise of surface-mount devices (SMD)<\\\/h3>

            The 1980s changed the field. Surface-mount devices (SMD) became the preferred parts for engineers. Square flat packages grew common. SMD discrete parts made it hard to route under parts. Boards had to get smaller. Single-sided boards became harder to use. This pushed the growth of double-sided board techniques. With vias, you no longer had to keep all copper on the same side. You could route on both sides with plated holes that connect layers.<\\\/p>

            \\\"surface-mount<\\\/p>

            Double-sided printed circuit boards<\\\/h2>

            Engineers moved to double-sided boards mainly for ease. When design limits force parts to a certain area, double-sided layouts are easier than single-sided ones. Double-sided boards also let you make large ground or power planes. If you look at a board closely, you may see large cuts of copper instead of many thin traces. These large copper zones help with EMI, heat, manufacturability, and most of all, they cut the routing work.<\\\/p>

            Why single-sided boards still exist<\\\/h2>

            Even though double-sided boards have clear benefits, single-sided designs still appear in many products today. Cost is the main driver. Single-sided PCBs usually cost a little less to buy and sometimes have shorter lead times. For a simple design, that is a clear plus. In mass production of simple products, saving a few cents per board can matter a lot. Also, for high current traces that need wide copper, single-sided layouts can be a good fit. They let you use large copper areas and simple routing for heavy current paths.<\\\/p>

            Pros and cons of single-sided PCBs<\\\/h3>

            Pros<\\\/h3>

            • Lower cost.<\\\/p><\\\/li>

            • Simpler design and manufacture.<\\\/p><\\\/li>

            • Shorter lead time in many cases.<\\\/p><\\\/li><\\\/ul>

              Cons<\\\/h3>

              • Not good for complex designs with many parts.<\\\/p><\\\/li>

              • Hard to meet small size needs.<\\\/p><\\\/li>

              • Lower routing capacity.<\\\/p><\\\/li>

              • Might be heavier and larger for the same function.<\\\/p><\\\/li><\\\/ul>

                Typical applications of single-sided PCBs<\\\/h2>

                Single-sided boards are common in many low-cost products. They appear in devices with simple functions that do not need large memory or network links. Examples include small home appliances like coffee machines. They also show up in many calculators, simple radios, printers, and LED lamps. Simple storage devices like basic solid-state drives may use single-sided boards. Power supplies and many kinds of sensors often use single-sided PCBs too.<\\\/p>

                How to tell single-sided, double-sided and multi-layer boards<\\\/h2>

                1. Hold the board to a light. If the inner core is fully opaque and you cannot see light through inner layers, it is a multi-layer board. If you can see only one copper layer, it is a single-sided board.<\\\/p><\\\/li>

                2. Look at the holes. Single-sided boards have non-plated holes. They do not have plating on hole walls and they skip the electroplating process. Double-sided boards have plated through-holes or vias. That means you will see copper inside the hole.<\\\/p><\\\/li>

                3. The basic difference is the number of copper layers: single has one copper layer, double has two copper layers, and multi-layer has three layers or more. In multi-layer making, inner layers are added and then the stack is laminated. You can cut a cross-section to check layers if needed.<\\\/p><\\\/li><\\\/ol>

                  \\\"double-sided<\\\/p>

                  How to reduce EMI on single or double-sided PCBs<\\\/h2>

                  For cost reasons, many consumer devices use single or double-sided boards. As digital pulse circuits become common, EMI issues rise. The main cause is large signal loop area. Large loop areas not only emit stronger radiation, they also make the circuit more sensitive to outside noise. To improve EMC, the simplest approach is to reduce the loop area of critical signals.<\\\/p>

                  Identify key signals<\\\/h3>

                  From an EMC view, key signals include those that make strong radiation and those that are sensitive to outside noise. Strong radiators are often periodic signals such as clocks and low-order address lines. Sensitive signals are often low-level analog lines.<\\\/p>

                  Methods to reduce loop area<\\\/h3>

                  One simple method is to route a ground trace next to the signal trace. Put the ground as close as you can. That layout makes a very small loop area and cuts differential radiation and sensitivity. When you add a ground trace next to the signal, the signal current will mainly flow in that small loop, not in other ground paths.<\\\/p>

                  If you use a double-sided board, place a ground trace on the other side right under the signal line. Make that ground trace wide if you can. The loop area then equals board thickness times the signal line length. That area is much smaller than a long open loop and helps cut radiation.<\\\/p>

                  Also, always use a ground copper mesh on double-sided boards. A ground mesh lowers ground impedance. With a ground mesh, a signal line almost always has a ground line nearby and forms a smaller loop area. When routing, keep key lines close to ground. Only the most critical lines need a ground right next to them.<\\\/p>

                  Other basic tips:<\\\/p>

                  • Use short traces for high-speed signals.<\\\/p><\\\/li>

                  • Use proper decoupling capacitors near power pins.<\\\/p><\\\/li>

                  • Keep analog and digital grounds separated and then join them at a single point if needed.<\\\/p><\\\/li>

                  • Avoid long loops. Route return paths near the signal path.<\\\/p><\\\/li><\\\/ul>

                    Small practical examples<\\\/h2>

                    • For a clock trace on a double-sided board, put a wide ground trace under it on the other side. If the board thickness is 1.6 mm and the clock trace is 50 mm long, the loop area is roughly 1.6 mm \\u00d7 50 mm. If you can shorten the trace to 20 mm, the area drops a lot.<\\\/p><\\\/li>

                    • For an analog signal that is sensitive, run a ground trace right beside it on the same side. Then the pair forms a tight loop and lowers pickup.<\\\/p><\\\/li><\\\/ul>

                      Summary<\\\/h2>

                      Single-sided PCBs are simple and cheap. They place all parts on one side and all traces on the other. Double-sided boards add a second layer and use vias to connect both sides. fr4 is the common material for both. The move from through-hole parts to surface-mount parts drove the need for double-sided and multi-layer boards. Yet single-sided boards still make sense for many simple products because of cost and ease. To lower EMI on single or double-sided boards, reduce loop area, add nearby ground traces, use ground mesh, and keep traces short.<\\\/p>\",\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"20bc943\"}]},\"elements\":[],\"widgetType\":\"text-editor\"}],\"isInner\":false},{\"id\":\"4atp7ws\",\"elType\":\"section\",\"settings\":{\"gap\":\"no\",\"content_position\":\"top\",\"background_background\":\"classic\",\"background_color\":\"#FFFFFF00\",\"background_position\":\"bottom center\",\"background_attachment\":\"scroll\",\"background_repeat\":\"no-repeat\",\"background_size\":\"cover\",\"background_size_mobile\":\"cover\",\"background_overlay_background\":\"classic\",\"background_overlay_color_b\":\"rgba(255,255,255,0)\",\"background_overlay_opacity\":{\"unit\":\"px\",\"size\":\"\",\"sizes\":[]},\"padding\":{\"unit\":\"px\",\"top\":\"0\",\"right\":\"0\",\"bottom\":\"0\",\"left\":\"0\",\"isLinked\":false},\"padding_tablet\":{\"unit\":\"px\",\"top\":\"80\",\"right\":\"40\",\"bottom\":\"80\",\"left\":\"40\",\"isLinked\":false},\"padding_mobile\":{\"unit\":\"px\",\"top\":\"50\",\"right\":\"25\",\"bottom\":\"50\",\"left\":\"25\",\"isLinked\":false},\"content_width\":{\"unit\":\"px\",\"size\":800,\"sizes\":[]},\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"7965ef2\"}],\"margin\":{\"unit\":\"px\",\"top\":\"0\",\"right\":0,\"bottom\":\"0\",\"left\":0,\"isLinked\":true}},\"elements\":[{\"id\":\"7882748\",\"elType\":\"column\",\"settings\":{\"_column_size\":100,\"_inline_size\":null,\"padding\":{\"unit\":\"px\",\"top\":\"0\",\"right\":\"0\",\"bottom\":\"0\",\"left\":\"0\",\"isLinked\":true},\"space_between_widgets\":40,\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"9b127ef\"}]},\"elements\":[{\"id\":\"9fc6712\",\"elType\":\"widget\",\"settings\":{\"title\":\"Frequently Asked Questions\",\"align\":\"center\",\"display_condition_list\":[{\"display_condition_login_status\":\"subscriber\",\"_id\":\"90c9854\"}]},\"elements\":[],\"widgetType\":\"heading\"},{\"id\":\"631b990\",\"elType\":\"widget\",\"settings\":{\"tabs\":[{\"_id\":\"a2a8268\",\"tab_title\":\"What are the main advantages of single-sided PCBs?\",\"tab_content\":\"

                      They are low cost, simple to design and manufacture, easy to test\\\/repair, and ideal for large-volume, low-complexity products.<\\\/p>\"},{\"_id\":\"c04905e\",\"tab_title\":\"Are single-sided PCBs cheaper than double-sided or multilayer boards?\",\"tab_content\":\"

                      Yes\\u2014material and process complexity are lower, so unit cost and lead time are usually significantly less than for double-sided or multilayer PCBs.<\\\/p>\"},{\"_id\":\"bd39d67\",\"tab_title\":\"Any special assembly notes for single-sided boards?\",\"tab_content\":\"

                      Because components are on one side, plan part placement for reflow\\\/wave soldering and ensure no obstructing components on the solder side; discuss solder process with your assembler.<\\\/p>\"},{\"_id\":\"7e12e3e\",\"tab_title\":\"How are single-sided PCBs tested before shipping?\",\"tab_content\":\"

                      Typical QA includes visual inspection, AOI (if applicable), electrical continuity\\\/short tests, and functional testing when required by the customer.<\\\/p>\"},{\"_id\":\"da6daba\",\"tab_title\":\"What design rules are important for single-layer layouts?\",\"tab_content\":\"

                      Follow standard clearance and trace-width rules, route to minimize crossovers (since no second layer exists), and leave space for through-holes and pads\\u2014confirm fab DRC and minimums.<\\\/p>\"}],\"border_width\":{\"unit\":\"px\",\"size\":1,\"sizes\":[]},\"border_color\":\"#F5F5F5\",\"selected_icon\":{\"value\":\"fas fa-plus-circle\",\"library\":\"fa-solid\"},\"selected_active_icon\":{\"value\":\"fas fa-minus-circle\",\"library\":\"fa-solid\"},\"tab_active_color\":\"rgba(0, 124, 186, 0.97)\",\"_border_radius\":{\"unit\":\"px\",\"top\":\"0\",\"right\":\"0\",\"bottom\":\"0\",\"left\":\"0\",\"isLinked\":true},\"_box_shadow_box_shadow\":{\"horizontal\":0,\"vertical\":3,\"blur\":12,\"spread\":4,\"color\":\"rgba(0, 0, 0, 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                      \\n\\t\\t\\t\\t\\t
                      \\n\\t\\t[elementor-element k=\\\"0e46bd9387093ca73b9000e38f18cce4\\\" data=\\\"{"id":"7c49487","elType":"widget","settings":{"editor":"<p data-start=\"50\" data-end=\"348\">A single-sided PCB is the most basic printed circuit board. All parts sit on one side. All traces sit on the other side. Because only one side has traces, we call it a single-sided board. It is easy to make and it costs less. For that reason, simple electronic products often use single-sided PCBs.<\/p><p data-start=\"50\" data-end=\"348\"><img class=\"alignnone size-full wp-image-2779\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Single-sided-PCB.webp\" alt=\"Single-sided PCB\" width=\"600\" height=\"367\" \/><\/p><h2 data-start=\"350\" data-end=\"383\">When to use a double-sided PCB<\/h2><p data-start=\"384\" data-end=\"739\">A double-sided PCB is a step up from a single-sided board. When one layer of routing cannot meet the needs of a product, designers use a double-sided board. Both sides have copper and traces. The two sides can connect with plated holes called vias. Vias let signals move from one layer to the other. That way the board can form the needed circuit network.<\/p><h2 data-start=\"741\" data-end=\"814\">Similarities and differences between single-sided and double-sided PCBs<\/h2><h3 data-start=\"816\" data-end=\"845\">Materials and base process<\/h3><p data-start=\"846\" data-end=\"1229\">Single-sided and double-sided PCBs share the same basic material. Most modern boards use fr4. fr4 is a mix of glass fiber and epoxy. In modern making, we usually plate the board with copper for good conductivity. Then we add a solder mask for a neat look and for protection. A silkscreen or screen print adds labels and marks. Machines print the marks in a process called silkscreen.<\/p><h3 data-start=\"1231\" data-end=\"1262\">Old manufacturing and limits<\/h3><p data-start=\"1263\" data-end=\"1586\">Modern board making was not always like this. In the past, engineers and hobbyists exposed designs on boards and then etched them by hand with chemical baths. Many methods existed. Most had the same limits. You could not etch many layers on one board easily. That forced layouts to be larger and to need heavy optimization.<\/p><p data-start=\"1588\" data-end=\"1893\">In the 1960s this was fine. Large through-hole parts were the norm. Big rectangular chips had wide pins. These were DIP packages. Discrete through-hole parts like resistors and capacitors were large too. Parts laid close together so short traces were easy. That made single-sided layouts simple and clear.<\/p><h3 data-start=\"1895\" data-end=\"1937\">The rise of surface-mount devices (SMD)<\/h3><p data-start=\"1938\" data-end=\"2385\">The 1980s changed the field. Surface-mount devices (SMD) became the preferred parts for engineers. Square flat packages grew common. SMD discrete parts made it hard to route under parts. Boards had to get smaller. Single-sided boards became harder to use. This pushed the growth of double-sided board techniques. With vias, you no longer had to keep all copper on the same side. You could route on both sides with plated holes that connect layers.<\/p><p data-start=\"1938\" data-end=\"2385\"><img class=\"alignnone size-full wp-image-2780\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/surface-mount-devices.webp\" alt=\"surface-mount devices\" width=\"600\" height=\"375\" \/><\/p><h2 data-start=\"2387\" data-end=\"2424\">Double-sided printed circuit boards<\/h2><p data-start=\"2426\" data-end=\"2858\">Engineers moved to double-sided boards mainly for ease. When design limits force parts to a certain area, double-sided layouts are easier than single-sided ones. Double-sided boards also let you make large ground or power planes. If you look at a board closely, you may see large cuts of copper instead of many thin traces. These large copper zones help with EMI, heat, manufacturability, and most of all, they cut the routing work.<\/p><h2 data-start=\"2860\" data-end=\"2897\">Why single-sided boards still exist<\/h2><p data-start=\"2899\" data-end=\"3427\">Even though double-sided boards have clear benefits, single-sided designs still appear in many products today. Cost is the main driver. Single-sided PCBs usually cost a little less to buy and sometimes have shorter lead times. For a simple design, that is a clear plus. In mass production of simple products, saving a few cents per board can matter a lot. Also, for high current traces that need wide copper, single-sided layouts can be a good fit. They let you use large copper areas and simple routing for heavy current paths.<\/p><h3 data-start=\"3429\" data-end=\"3465\">Pros and cons of single-sided PCBs<\/h3><h3 data-start=\"3467\" data-end=\"3475\">Pros<\/h3><ul data-start=\"3476\" data-end=\"3564\"><li data-start=\"3476\" data-end=\"3491\"><p data-start=\"3478\" data-end=\"3491\">Lower cost.<\/p><\/li><li data-start=\"3492\" data-end=\"3527\"><p data-start=\"3494\" data-end=\"3527\">Simpler design and manufacture.<\/p><\/li><li data-start=\"3528\" data-end=\"3564\"><p data-start=\"3530\" data-end=\"3564\">Shorter lead time in many cases.<\/p><\/li><\/ul><h3 data-start=\"3566\" data-end=\"3574\">Cons<\/h3><ul data-start=\"3575\" data-end=\"3740\"><li data-start=\"3575\" data-end=\"3624\"><p data-start=\"3577\" data-end=\"3624\">Not good for complex designs with many parts.<\/p><\/li><li data-start=\"3625\" data-end=\"3659\"><p data-start=\"3627\" data-end=\"3659\">Hard to meet small size needs.<\/p><\/li><li data-start=\"3660\" data-end=\"3687\"><p data-start=\"3662\" data-end=\"3687\">Lower routing capacity.<\/p><\/li><li data-start=\"3688\" data-end=\"3740\"><p data-start=\"3690\" data-end=\"3740\">Might be heavier and larger for the same function.<\/p><\/li><\/ul><h2 data-start=\"3742\" data-end=\"3785\">Typical applications of single-sided PCBs<\/h2><p data-start=\"3787\" data-end=\"4233\">Single-sided boards are common in many low-cost products. They appear in devices with simple functions that do not need large memory or network links. Examples include small home appliances like coffee machines. They also show up in many calculators, simple radios, printers, and LED lamps. Simple storage devices like basic solid-state drives may use single-sided boards. Power supplies and many kinds of sensors often use single-sided PCBs too.<\/p><h2 data-start=\"4235\" data-end=\"4298\">How to tell single-sided, double-sided and multi-layer boards<\/h2><ol data-start=\"4300\" data-end=\"5047\"><li data-start=\"4300\" data-end=\"4505\"><p data-start=\"4303\" data-end=\"4505\">Hold the board to a light. If the inner core is fully opaque and you cannot see light through inner layers, it is a multi-layer board. If you can see only one copper layer, it is a single-sided board.<\/p><\/li><li data-start=\"4506\" data-end=\"4756\"><p data-start=\"4509\" data-end=\"4756\">Look at the holes. Single-sided boards have non-plated holes. They do not have plating on hole walls and they skip the electroplating process. Double-sided boards have plated through-holes or vias. That means you will see copper inside the hole.<\/p><\/li><li data-start=\"4757\" data-end=\"5047\"><p data-start=\"4760\" data-end=\"5047\">The basic difference is the number of copper layers: single has one copper layer, double has two copper layers, and multi-layer has three layers or more. In multi-layer making, inner layers are added and then the stack is laminated. You can cut a cross-section to check layers if needed.<\/p><\/li><\/ol><p><img class=\"alignnone size-full wp-image-2778\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/double-sided-PCB.webp\" alt=\"double-sided PCB\" width=\"500\" height=\"500\" \/><\/p><h2 data-start=\"5049\" data-end=\"5099\">How to reduce EMI on single or double-sided PCBs<\/h2><p data-start=\"5101\" data-end=\"5472\">For cost reasons, many consumer devices use single or double-sided boards. As digital pulse circuits become common, EMI issues rise. The main cause is large signal loop area. Large loop areas not only emit stronger radiation, they also make the circuit more sensitive to outside noise. To improve EMC, the simplest approach is to reduce the loop area of critical signals.<\/p><h3 data-start=\"5474\" data-end=\"5497\">Identify key signals<\/h3><p data-start=\"5498\" data-end=\"5755\">From an EMC view, key signals include those that make strong radiation and those that are sensitive to outside noise. Strong radiators are often periodic signals such as clocks and low-order address lines. Sensitive signals are often low-level analog lines.<\/p><h3 data-start=\"5757\" data-end=\"5787\">Methods to reduce loop area<\/h3><p data-start=\"5788\" data-end=\"6115\">One simple method is to route a ground trace next to the signal trace. Put the ground as close as you can. That layout makes a very small loop area and cuts differential radiation and sensitivity. When you add a ground trace next to the signal, the signal current will mainly flow in that small loop, not in other ground paths.<\/p><p data-start=\"6117\" data-end=\"6402\">If you use a double-sided board, place a ground trace on the other side right under the signal line. Make that ground trace wide if you can. The loop area then equals board thickness times the signal line length. That area is much smaller than a long open loop and helps cut radiation.<\/p><p data-start=\"6404\" data-end=\"6717\">Also, always use a ground copper mesh on double-sided boards. A ground mesh lowers ground impedance. With a ground mesh, a signal line almost always has a ground line nearby and forms a smaller loop area. When routing, keep key lines close to ground. Only the most critical lines need a ground right next to them.<\/p><p data-start=\"6719\" data-end=\"6736\">Other basic tips:<\/p><ul data-start=\"6737\" data-end=\"6992\"><li data-start=\"6737\" data-end=\"6781\"><p data-start=\"6739\" data-end=\"6781\">Use short traces for high-speed signals.<\/p><\/li><li data-start=\"6782\" data-end=\"6835\"><p data-start=\"6784\" data-end=\"6835\">Use proper decoupling capacitors near power pins.<\/p><\/li><li data-start=\"6836\" data-end=\"6929\"><p data-start=\"6838\" data-end=\"6929\">Keep analog and digital grounds separated and then join them at a single point if needed.<\/p><\/li><li data-start=\"6930\" data-end=\"6992\"><p data-start=\"6932\" data-end=\"6992\">Avoid long loops. Route return paths near the signal path.<\/p><\/li><\/ul><h2 data-start=\"6994\" data-end=\"7020\">Small practical examples<\/h2><ul data-start=\"7022\" data-end=\"7437\"><li data-start=\"7022\" data-end=\"7290\"><p data-start=\"7024\" data-end=\"7290\">For a clock trace on a double-sided board, put a wide ground trace under it on the other side. If the board thickness is 1.6 mm and the clock trace is 50 mm long, the loop area is roughly 1.6 mm \u00d7 50 mm. If you can shorten the trace to 20 mm, the area drops a lot.<\/p><\/li><li data-start=\"7291\" data-end=\"7437\"><p data-start=\"7293\" data-end=\"7437\">For an analog signal that is sensitive, run a ground trace right beside it on the same side. Then the pair forms a tight loop and lowers pickup.<\/p><\/li><\/ul><h2 data-start=\"7439\" data-end=\"7448\">Summary<\/h2><p data-start=\"7450\" data-end=\"7998\">Single-sided PCBs are simple and cheap. They place all parts on one side and all traces on the other. Double-sided boards add a second layer and use vias to connect both sides. fr4 is the common material for both. The move from through-hole parts to surface-mount parts drove the need for double-sided and multi-layer boards. Yet single-sided boards still make sense for many simple products because of cost and ease. To lower EMI on single or double-sided boards, reduce loop area, add nearby ground traces, use ground mesh, and keep traces short.<\/p>","display_condition_list":[{"display_condition_login_status":"subscriber","_id":"20bc943"}]},"elements":[],"widgetType":"text-editor"}\\\"]\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t
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                      Frequently Asked Questions<\\\/h2>\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t
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                      \\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tWhat are the main advantages of single-sided PCBs?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t

                      They are low cost, simple to design and manufacture, easy to test\\\/repair, and ideal for large-volume, low-complexity products.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t

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                      \\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tAre single-sided PCBs cheaper than double-sided or multilayer boards?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t

                      Yes\\u2014material and process complexity are lower, so unit cost and lead time are usually significantly less than for double-sided or multilayer PCBs.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t

                      \\n\\t\\t\\t\\t\\t
                      \\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tAny special assembly notes for single-sided boards?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t

                      Because components are on one side, plan part placement for reflow\\\/wave soldering and ensure no obstructing components on the solder side; discuss solder process with your assembler.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t

                      \\n\\t\\t\\t\\t\\t
                      \\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tHow are single-sided PCBs tested before shipping?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t

                      Typical QA includes visual inspection, AOI (if applicable), electrical continuity\\\/short tests, and functional testing when required by the customer.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t

                      \\n\\t\\t\\t\\t\\t
                      \\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t<\\\/path><\\\/svg><\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t<\\\/span>\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tWhat design rules are important for single-layer layouts?<\\\/a>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t

                      Follow standard clearance and trace-width rules, route to minimize crossovers (since no second layer exists), and leave space for through-holes and pads\\u2014confirm fab DRC and minimums.<\\\/p><\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t<\\\/div>\\n\\t\\t\\t\\t\\t<\\\/div>\\n\\t\\t<\\\/section>\\n\\t\\t\",\"scripts\":[],\"styles\":[]}}"],"_uag_page_assets":["a:9:{s:3:\"css\";s:30170:\".uag-blocks-common-selector{z-index:var(--z-index-desktop) !important}@media(max-width: 976px){.uag-blocks-common-selector{z-index:var(--z-index-tablet) !important}}@media(max-width: 767px){.uag-blocks-common-selector{z-index:var(--z-index-mobile) !important}}.uagb-social-share__outer-wrap,.uagb-social-share__wrap{display:flex;align-items:center;justify-content:center}.uagb-social-share__layout-vertical.uagb-social-share__outer-wrap,.uagb-social-share__layout-vertical 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single-sided PCB is the most basic printed circuit board. All parts sit on one side. All traces sit on […]","_links":{"self":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/2625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/comments?post=2625"}],"version-history":[{"count":18,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/2625\/revisions"}],"predecessor-version":[{"id":3406,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/2625\/revisions\/3406"}],"up":[{"embeddable":true,"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/pages\/1898"}],"wp:attachment":[{"href":"https:\/\/flj-pcb.com\/vi\/wp-json\/wp\/v2\/media?parent=2625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}