{"id":4805,"date":"2026-03-12T09:17:05","date_gmt":"2026-03-12T09:17:05","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4805"},"modified":"2026-03-12T09:33:13","modified_gmt":"2026-03-12T09:33:13","slug":"pcb-blind-and-buried-via-manufacturing-process-guide","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/es\/pcb-blind-and-buried-via-manufacturing-process-guide\/","title":{"rendered":"Gu\u00eda del proceso de fabricaci\u00f3n de v\u00edas ciegas y enterradas de PCB"},"content":{"rendered":"<h2 class=\"wp-block-heading\">1. Visi\u00f3n general<\/h2>\n\n\n\n<p>Las v\u00edas ciegas y las v\u00edas enterradas se utilizan principalmente en placas de alta densidad y en placas con orificios muy peque\u00f1os. El objetivo es ahorrar espacio y reducir el tama\u00f1o de la placa. Un ejemplo habitual son las placas de circuito impreso para tel\u00e9fonos m\u00f3viles.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. Clasificaci\u00f3n<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">A) Taladrado l\u00e1ser<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. Razones para utilizar el taladrado l\u00e1ser<\/h4>\n\n\n\n<p>a. El cliente solicita un taladrado l\u00e1ser.<br>b. Las v\u00edas ciegas pueden ser muy peque\u00f1as (&lt;= 6 MIL), por lo que s\u00f3lo un l\u00e1ser puede perforarlas de forma fiable.<br>c. Para pilas de v\u00edas ciegas y enterradas especiales - por ejemplo, si hay una v\u00eda ciega de L1 a L2 y una v\u00eda enterrada de L2 a L3 - se requiere perforaci\u00f3n l\u00e1ser.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. Principio del taladrado l\u00e1ser<\/h4>\n\n\n\n<p>El taladrado l\u00e1ser utiliza el calor del l\u00e1ser para vaporizar o fundir el material de la placa y hacer un agujero. Para que esto funcione, el material de la placa debe absorber la energ\u00eda del l\u00e1ser. Por este motivo, se suelen utilizar materiales de tipo RCC, ya que no contienen tejido de fibra de vidrio y, por tanto, no reflejan el l\u00e1ser.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. Breve introducci\u00f3n al material RCC<\/h4>\n\n\n\n<p>RCC significa Resin Coated Copper (cobre recubierto de resina). Es una l\u00e1mina de cobre que tiene una capa de resina especial en la cara rugosa de la l\u00e1mina de cobre electrol\u00edtico.<br>En nuestra empresa tenemos tres proveedores de CCR: Shengyi, Mitsui y LG.<br>Opciones de material: grosor de la resina 50, 65, 70, 75, 80 \u00b5m, grosor de la l\u00e1mina de cobre 12, 18 \u00b5m, etc.<br>El RCC est\u00e1 disponible en grados de alta y baja Tg. Su constante diel\u00e9ctrica suele ser inferior a la del FR-4 est\u00e1ndar. Por ejemplo, el S6018 de Shengyi tiene una constante diel\u00e9ctrica de 3,8, as\u00ed que tenga cuidado cuando necesite controlar la impedancia.<br>Si desea m\u00e1s informaci\u00f3n sobre materiales concretos, consulte al equipo de PE (ingenier\u00eda de producto) o RD (investigaci\u00f3n y desarrollo).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. Herramientas y requisitos de las herramientas para el taladrado l\u00e1ser<\/h4>\n\n\n\n<p>A) Es dif\u00edcil que el l\u00e1ser atraviese el cobre. Por lo tanto, antes de taladrar con l\u00e1ser, grabe un espacio libre de cobre en las posiciones de las v\u00edas ciegas. La holgura debe coincidir con el tama\u00f1o del orificio acabado.<br>B) Las marcas de posicionamiento para el taladrado l\u00e1ser se a\u00f1aden en la capa L2 \/ L(N-1). M\u00e1rquelo en la p\u00e1gina de cambio de l\u00e1mina MI.<br>C) La pel\u00edcula para grabar los puntos ciegos debe ser producida por LDI. Los paneles cortados y el utillaje deben utilizar el tama\u00f1o de panel LDI.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">5. Caracter\u00edsticas del flujo de producci\u00f3n<\/h4>\n\n\n\n<p>A) Cuando el n\u00famero total de capas de la placa es N, haga primero las capas L2-L(N-1) siguiendo el proceso normal de capas internas.<br>B) Despu\u00e9s de la laminaci\u00f3n y del trazado del contorno de la placa, cambie el flujo como se indica a continuaci\u00f3n:<br>\u2192 taladrar orificios de registro LDI \u2192 pel\u00edcula seca \u2192 grabar puntos ciegos \u2192 taladrar con l\u00e1ser \u2192 taladrar orificios pasantes \u2192 cobreado qu\u00edmico \u2192 (proceso normal).<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">6. Otras notas<\/h4>\n\n\n\n<p>A) Los materiales de CCR no tienen certificaci\u00f3n UL en muchos casos. Por lo tanto, no a\u00f1ada una marca UL a estas placas por ahora.<br>B) Acerca de la disposici\u00f3n de paneles y MI: para evitar que las disposiciones que incluyen RCC se traten como paneles de falsa capa (la tienda de pel\u00edculas MI fabrica las pel\u00edculas de falsa capa de forma diferente a las pel\u00edculas normales), separe RCC de L2 o L(N-1) al dibujar la estructura del panel. Por ejemplo, v\u00e9ase la disposici\u00f3n de paneles SR2711\/01.<br>C) IPC-6016 es la norma para placas HDI:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Espesor del cobre de la pared de la v\u00eda ciega l\u00e1ser: 0,4 mil (min).<\/li>\n\n\n\n<li>Requisito de filete de soldadura: se permite la tangencia.<\/li>\n\n\n\n<li>Si el tama\u00f1o de la almohadilla no es m\u00e1s de 5 mil m\u00e1s grande que el di\u00e1metro del orificio, considere a\u00f1adir una l\u00e1grima.<br>D) Mantenga el borde del tablero \u2265 0,8\u201d.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"548\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout.webp\" alt=\"SR2711-01 panel layout\" class=\"wp-image-4806\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-300x206.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-768x526.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2026\/03\/SR2711-01-panel-layout-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">B) Taladrado mec\u00e1nico de v\u00edas ciegas\/enterradas<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u00c1mbito de aplicaci\u00f3n<\/h4>\n\n\n\n<p>Cuando el tama\u00f1o de la broca es \u2265 0,20 mm, considere la perforaci\u00f3n mec\u00e1nica.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. M\u00e9todo de revestimiento para v\u00edas ciegas\/enterradas (v\u00e9ase la notificaci\u00f3n RD TSFMRD-113)<\/h4>\n\n\n\n<p>A) Normalmente, cualquier superficie de cobre de circuito de una capa puede tener s\u00f3lo un paso de metalizado de panel m\u00e1s un paso de metalizado de patr\u00f3n.<br>B) Normalmente, una vez finalizado el proceso de laminado completo y cuando el espesor de la placa es \u2265 80 MIL, los orificios pasantes requieren el metalizado de panel + metalizado de patr\u00f3n. Por lo tanto, al metalizar v\u00edas ciegas, la superficie de la capa exterior no debe metalizarse en panel.<br>C) Si se cumplen los dos puntos anteriores, el metalizado por v\u00eda ciega se realiza del siguiente modo:<br>I) Si la anchura de la traza de la capa exterior &gt; 6 MIL y el espesor de la placa con orificios pasantes &lt; 80 MIL, durante el metalizado de la v\u00eda ciega se puede metalizar la superficie del panel de la capa exterior.<br>II) Si la anchura de la traza de la capa exterior &gt; 6 MIL pero el grosor de la placa con orificios pasantes &gt; 80 MIL, durante el metalizado de la v\u00eda ciega la superficie de la capa exterior necesita protecci\u00f3n de pel\u00edcula.<br>III) Si la anchura de la traza de la capa exterior es &lt; 6 MIL y el grosor de la placa de agujeros pasantes \u2265 80 MIL, durante el metalizado de la v\u00eda ciega la superficie de la capa exterior necesita protecci\u00f3n de pel\u00edcula.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. M\u00e9todos de pel\u00edcula (m\u00e1scara de soldadura \/ pel\u00edcula seca)<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Cuando la relaci\u00f3n de aspecto de la v\u00eda ciega L\/D \u2264 0,8, se aplica una pel\u00edcula seca en la superficie de la capa exterior y se expone todo el panel. A continuaci\u00f3n, las superficies de la v\u00eda ciega de la capa interior se electrodepositan como un panel completo.<\/li>\n\n\n\n<li>Cuando la relaci\u00f3n de aspecto de la v\u00eda ciega L\/D &gt; 0,8, aplique pel\u00edcula seca en la superficie de la capa exterior y exponga s\u00f3lo los puntos de la v\u00eda ciega. Para ello, debe hacer una pel\u00edcula de exposici\u00f3n de puntos de metalizado o utilizar la exposici\u00f3n LDI. A continuaci\u00f3n, las superficies de las v\u00edas ciegas de la capa interior se electrodepositan como un panel completo.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">4. M\u00e9todos de exposici\u00f3n de los puntos ciegos<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Para v\u00edas ciegas \u2264 0,4 mm (16 MIL), utilice LDI para exponer los puntos de la v\u00eda ciega.<\/li>\n\n\n\n<li>Para v\u00edas ciegas &gt; 0,4 mm (16 MIL), utilice pel\u00edcula para exponer los puntos de la v\u00eda ciega.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">5. M\u00e9todos de pel\u00edcula para v\u00edas enterradas<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Cuando la anchura de la traza del lado de la v\u00eda enterrada \u2264 4 MIL, la superficie de la v\u00eda enterrada necesita pel\u00edcula para exponer los puntos.<\/li>\n\n\n\n<li>Cuando la anchura de la traza del lado de la v\u00eda enterrada es &gt; 4 MIL, la superficie de la v\u00eda enterrada puede chaparse directamente en el panel.<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">6. Notas y puntos a recordar<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Para la relaci\u00f3n de aspecto L\/D L = espesor del diel\u00e9ctrico + espesor del cobre, D = di\u00e1metro de la v\u00eda ciega\/enterrada.<\/li>\n\n\n\n<li>Para las pel\u00edculas de metalizado ciego\/en relieve: di\u00e1metro del punto de exposici\u00f3n D_spot = D - 6 (MIL).\n<ul class=\"wp-block-list\">\n<li>A\u00f1ada marcas de alineaci\u00f3n a la pel\u00edcula del punto de exposici\u00f3n. Sus coordenadas deben coincidir con los orificios de referencia exteriores.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Las v\u00edas ciegas que necesitan protecci\u00f3n de pel\u00edcula se recubren generalmente con corriente de impulsos (AC) durante la galvanoplastia.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. Requisitos especiales y notas sobre el proceso para las placas de v\u00eda ciega<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>V\u00edas ciegas rellenas de resina<\/strong>:<br>Cuando el tama\u00f1o de las v\u00edas enterradas es grande y hay muchos agujeros, el prensado de la placa puede necesitar mucha resina para rellenar las v\u00edas. Para evitar que esto afecte al grosor final de la placa, I+D puede solicitar que se rellenen previamente las v\u00edas enterradas con resina antes del laminado. El m\u00e9todo de relleno puede seguir el m\u00e9todo de relleno de v\u00edas de la m\u00e1scara de soldadura verde.<\/li>\n\n\n\n<li><strong>Cuando la capa exterior tiene v\u00edas ciegas<\/strong>:<br>a. Durante el prensado, la capa exterior puede perder resina. Por lo tanto, despu\u00e9s de la laminaci\u00f3n, a\u00f1ada un paso de eliminaci\u00f3n de resina (desengomado).<br>b. Antes de secar la pel\u00edcula de la capa exterior, se limpia la superficie de la placa y se realiza un paso de pulido. El cobre qu\u00edmico (cobre qu\u00edmico) es muy fino (s\u00f3lo 0,05-0,1 mil), por lo que puede desgastarse durante el pulido. Para evitarlo, a\u00f1ada un paso de chapado del panel para espesar el cobre. Flujo t\u00edpico: laminaci\u00f3n \u2192 eliminaci\u00f3n de resina \u2192 taladrado \u2192 cobre qu\u00edmico \u2192 metalizado de paneles \u2192 pel\u00edcula seca \u2192 metalizado de patrones.<\/li>\n\n\n\n<li><strong>Placas de v\u00eda ciega de alto recuento de capas y PIN-LAM<\/strong>:<br>Cuando se fabrican placas con muchas capas y v\u00edas ciegas, se puede utilizar el laminado PIN-LAM. Tenga en cuenta que nuestras m\u00e1quinas s\u00f3lo pueden perforar agujeros PIN-LAM cuando el grosor del n\u00facleo es inferior a 30 MIL. En muchos casos seguimos utilizando el laminado normal; por ejemplo, PR4726010 se fabrica con laminado normal.<\/li>\n\n\n\n<li><strong>Borde del tablero<\/strong>:<br>Debido a que puede haber m\u00faltiples laminaciones y muchos agujeros de proceso, deje el borde del tablero \u2265 0,8\u201d.<\/li>\n\n\n\n<li><strong>Tarjeta LOT y notas del panel<\/strong>:<br>Al escribir la tarjeta LOT, para los subprocesos debe escribir la estructura del panel para el subproceso individual y tambi\u00e9n escribir la estructura del panel del proceso principal en los requisitos especiales. Esto ayuda a las operaciones posteriores.<\/li>\n\n\n\n<li><strong>D\u00f3nde colocar la pel\u00edcula seca ciega (capa interior o exterior)<\/strong>:<br>Ejemplos: si el grosor A del n\u00facleo es superior a 12 MIL (excluido el grosor del cobre), coloque la pel\u00edcula seca en la capa exterior. Si el espesor A del n\u00facleo es inferior a 12 MIL (excluido el espesor del cobre), coloque la pel\u00edcula seca en la capa interior.<\/li>\n<\/ol>\n\n\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. Recordatorios r\u00e1pidos y valores comprobados<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Mantenga el borde del tablero \u2265 0,8\u201d.<\/li>\n\n\n\n<li>Cobre de pared de v\u00eda ciega l\u00e1ser \u2265 0,4 mil.<\/li>\n\n\n\n<li>Para diferencia de tama\u00f1o de almohadilla vs agujero \u2264 5 mil, sugerir l\u00e1grimas.<\/li>\n\n\n\n<li>Utilice CCR para taladrar con l\u00e1ser porque el CCR absorbe el l\u00e1ser.<\/li>\n\n\n\n<li>Para el metalizado de v\u00edas ciegas\/enterradas, compruebe la anchura de la traza de la capa exterior y el grosor total de la placa para decidir si se va a metalizar el panel o se va a proteger con pel\u00edcula.<\/li>\n\n\n\n<li>L\/D = (diel\u00e9ctrico + cobre) \/ di\u00e1metro del agujero. Util\u00edzalo para elegir los m\u00e9todos de exposici\u00f3n y pel\u00edcula.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>1. Overview Blind vias and buried vias are mainly used for high-density boards and for boards with very small holes. 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