{"id":4895,"date":"2026-05-08T08:57:27","date_gmt":"2026-05-08T08:57:27","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4895"},"modified":"2026-05-08T08:57:30","modified_gmt":"2026-05-08T08:57:30","slug":"what-is-a-pcb-board","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/fi\/what-is-a-pcb-board\/","title":{"rendered":"Mik\u00e4 on piirilevy?"},"content":{"rendered":"<p>Jos olet joskus k\u00e4ytt\u00e4nyt digitaalista kelloa, laskinta, television kaukos\u00e4\u00e4dint\u00e4, reititint\u00e4, kannettavaa tietokonetta tai jopa lasten lelua, olet k\u00e4ytt\u00e4nyt piirilevy\u00e4. Yleens\u00e4 useita piirilevyj\u00e4.<\/p>\n\n\n\n<p>Yksinkertaisimmillaan piirilevy on eristetty levy, jossa on johtavia kuparikanavia, jotka yhdist\u00e4v\u00e4t elektroniset komponentit toisiinsa. N\u00e4m\u00e4 kuparireitit ohjaavat virran ja signaalit sinne, minne niiden on ment\u00e4v\u00e4, ja levy pit\u00e4\u00e4 kaiken my\u00f6s mekaanisesti paikallaan, jotta piiri ei ole vain hauras sekamelska irrallisia johtoja.<\/p>\n\n\n\n<p>Ja kyll\u00e4, ihmiset sanovat \u201cPCB board\u201d koko ajan, vaikka se on hieman turhaa (B tarkoittaa jo levy\u00e4). Se on kuitenkin yleist\u00e4, joten otamme sen k\u00e4ytt\u00f6\u00f6n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-0-a-pcb-in-plain-english\">PCB selkokielell\u00e4<\/h2>\n\n\n\n<p>Ajattele piirilevy\u00e4 kuin s\u00e4hk\u00f6n kaupunkikarttaa.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>komponentit<\/strong> (sirut, vastukset, kondensaattorit, liittimet) ovat rakennuksia.<\/li>\n\n\n\n<li>The <strong>kuparij\u00e4ljet<\/strong> ovat tiet.<\/li>\n\n\n\n<li>The <strong>tyynyt<\/strong> ovat parkkipaikkoja, joissa osia juotetaan.<\/li>\n\n\n\n<li>The <strong>l\u00e4piviennit<\/strong> ovat hissej\u00e4, jotka siirt\u00e4v\u00e4t signaaleja kerroksesta toiseen (kerroksesta toiseen).<\/li>\n<\/ul>\n\n\n\n<p>Jokaisella kuparireitill\u00e4 on merkityst\u00e4. Leveys, et\u00e4isyys, pituus, miss\u00e4 se kulkee ja mink\u00e4 vieress\u00e4 se kulkee. T\u00e4m\u00e4 \u201cpolku\u201d m\u00e4\u00e4ritt\u00e4\u00e4, miten piiri k\u00e4ytt\u00e4ytyy, erityisesti nopeissa tai korkeataajuisissa malleissa.<\/p>\n\n\n\n<p>Piirilevy ei siis ole vain \u201casia, johon kiinnitet\u00e4\u00e4n osia\u201d. Se on osa piiri\u00e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-1-what-does-pcb-stand-for-and-what-is-pwb\">Mit\u00e4 tarkoittaa PCB (ja mit\u00e4 on PWB)?<\/h2>\n\n\n\n<p>PCB = <strong>Painettu piirilevy<\/strong>.<\/p>\n\n\n\n<p>Saatat my\u00f6s kuulla:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PWB<\/strong> = <a href=\"https:\/\/en.wikipedia.org\/wiki\/Printed_wiring_board\" target=\"_blank\" rel=\"noreferrer noopener\">Painettu johdotuslevy<\/a>.<\/li>\n\n\n\n<li>Jotkut k\u00e4ytt\u00e4v\u00e4t sit\u00e4 tarkoittaakseen paljasta levy\u00e4 (substraatti ja kuparikuviot) ennen komponenttien kokoamista. Jokap\u00e4iv\u00e4isess\u00e4 keskustelussa PCB ja PWB sekoitetaan usein kesken\u00e4\u00e4n.<\/li>\n<\/ul>\n\n\n\n<p>Ja sitten on <strong>PCBA<\/strong> = piirilevykokoonpano, joka on piirilevy. <em>j\u00e4lkeen<\/em> komponentit sijoitetaan ja juotetaan.<\/p>\n\n\n\n<p>Lis\u00e4ksi nopea selvennys, koska se nousee jatkuvasti esiin.<\/p>\n\n\n\n<p>A <strong>emolevy on PCB<\/strong>, mutta kaikki piirilevyt eiv\u00e4t ole emolevyj\u00e4. Emolevy on vain suuri monimutkainen piirilevy, joka toimii tietokoneen p\u00e4\u00e4keskuksena.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-2-what-is-a-pcb-made-of\">Mist\u00e4 piirilevy on valmistettu?<\/h2>\n\n\n\n<p>Yleisimm\u00e4t piirilevyt on rakennettu:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pohjamateriaali (substraatti):<\/strong> yleens\u00e4 <a href=\"https:\/\/en.wikipedia.org\/wiki\/FR-4\" target=\"_blank\" rel=\"noreferrer noopener\">FR4 (kudottu lasikuitu + epoksihartsi)<\/a>. Vahva, vakaa, edullinen.<\/li>\n\n\n\n<li><strong>Kupari:<\/strong> ohut kuparifolio, joka on liimattu alustaan ja sitten sy\u00f6vytetty j\u00e4lkiin.<\/li>\n\n\n\n<li><strong>Juotosmaski:<\/strong> v\u00e4rillinen suojakerros (usein vihre\u00e4). Se auttaa est\u00e4m\u00e4\u00e4n juotosillat ja suojaa kuparia korroosiolta.<\/li>\n\n\n\n<li><strong>Silkkipaino:<\/strong> valkoinen (tai musta) painettu teksti ja merkinn\u00e4t. Komponenttien tarrat, logot, pin 1 -merkinn\u00e4t, varoitukset jne.<\/li>\n\n\n\n<li><strong>Pintak\u00e4sittely:<\/strong> pinnoite alttiina oleville tyynyille, jotta juottaminen olisi luotettavaa ja hapettuminen estett\u00e4isiin. Vaihtoehtoina ovat HASL, ENIG (kulta), upotushopea ja muut.<\/li>\n<\/ul>\n\n\n\n<p>Kun siis katsot piirilevy\u00e4, n\u00e4et oikeastaan materiaalipinon, joka on suunniteltu t\u00e4ytt\u00e4m\u00e4\u00e4n sek\u00e4 <strong>s\u00e4hk\u00f6iset tarpeet<\/strong> (signaalin reititys, impedanssi, maadoitus) ja <strong>mekaaniset tarpeet<\/strong> (kiinnitys, kest\u00e4vyys, vakaus).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-3-why-pcbs-matter-so-much-more-than-people-realize\">Miksi PCB:ll\u00e4 on niin paljon merkityst\u00e4 (enemm\u00e4n kuin ihmiset ymm\u00e4rt\u00e4v\u00e4t).<\/h2>\n\n\n\n<p>Piirilevyt ovat t\u00e4rkeit\u00e4, koska ne tekev\u00e4t useita teht\u00e4vi\u00e4 kerralla:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Piirien yhteenliitt\u00e4minen:<\/strong> puhtaat, toistettavat liitokset osien v\u00e4lill\u00e4.<\/li>\n\n\n\n<li><strong>Rakenteellinen tuki:<\/strong> ne pit\u00e4v\u00e4t komponentit tiukasti tiiviiss\u00e4 muodossa.<\/li>\n\n\n\n<li><strong>Piirin suojaus:<\/strong> <a href=\"https:\/\/resources.altium.com\/p\/what-solder-mask-expansion-value-should-you-use\" target=\"_blank\" rel=\"noreferrer noopener\">juotosmaski ja asetteluv\u00e4li<\/a> v\u00e4hent\u00e4\u00e4 oikosulkuja ja saastumisongelmia.<\/li>\n\n\n\n<li><strong>Tuotannon tehokkuus:<\/strong> kokoonpanolinjoilla osat voidaan sijoittaa ja juottaa nopeasti (erityisesti SMT).<\/li>\n\n\n\n<li><strong>Yll\u00e4pito ja p\u00e4ivitys:<\/strong> helpompi testata, korjata tai tarkistaa kuin k\u00e4sin kytkettyj\u00e4 johtoja.<\/li>\n\n\n\n<li><strong>Tihe\u00e4 integrointi:<\/strong> Nykyaikainen elektroniikka olisi k\u00e4yt\u00e4nn\u00f6ss\u00e4 mahdotonta ilman monikerroslevyj\u00e4, hienoja j\u00e4lki\u00e4 ja pieni\u00e4 l\u00e4pivientej\u00e4.<\/li>\n<\/ul>\n\n\n\n<p>Ja luotettavuudella on merkityst\u00e4. Viallinen piirilevy valmiissa tuotteessa voi olla eritt\u00e4in kallis korjata, kun se on jo maailmalla. Siksi DFM ja testaus ovat t\u00e4rke\u00e4 asia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-4-common-pcb-types-the-ones-you-actually-see-in-the-wild\">Yleiset piirilevytyypit (ne, joita n\u00e4kee luonnossa)<\/h2>\n\n\n\n<p>Piirilevyj\u00e4 voidaan luokitella monin eri tavoin, mutta n\u00e4m\u00e4 ovat t\u00e4rkeimm\u00e4t.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-5-1-single-sided-pcb\">1) Yksipuolinen PCB<\/h3>\n\n\n\n<p>Kupari vain toisella puolella. Yksinkertainen, halpa ja sit\u00e4 k\u00e4ytet\u00e4\u00e4n edelleen peruselektroniikassa.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"367\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Single-sided-PCB.webp\" alt=\"Single-sided PCB\" class=\"wp-image-2779\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Single-sided-PCB.webp 600w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Single-sided-PCB-300x184.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-6-2-double-sided-pcb\">2) Kaksipuolinen PCB<\/h3>\n\n\n\n<p>Kupari molemmin puolin, yhdistetty l\u00e4pivienneill\u00e4. Enemm\u00e4n reititystilaa, silti melko edullinen.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/double-sided-PCB.webp\" alt=\"double-sided PCB\" class=\"wp-image-2778\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/double-sided-PCB.webp 500w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/double-sided-PCB-300x300.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/double-sided-PCB-150x150.webp 150w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-7-3-multilayer-pcb\">3) Monikerroksinen PCB<\/h3>\n\n\n\n<p>Kolme tai useampi kuparikerros. Nykyaikaisissa laitteissa k\u00e4ytet\u00e4\u00e4n usein 4-, 6-, 8- tai sit\u00e4 korkeampia kerroksia. Tyypillinen 4-kerroksinen pino voi sis\u00e4lt\u00e4\u00e4:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Top-signaali<\/li>\n\n\n\n<li>Sisempi maataso<\/li>\n\n\n\n<li>Sisempi tehotaso (tai signaali)<\/li>\n\n\n\n<li>Alin signaali<\/li>\n<\/ul>\n\n\n\n<p>Monikerroksiset levyt tekev\u00e4t reitityksest\u00e4 puhtaampaa, v\u00e4hent\u00e4v\u00e4t melua ja tukevat <a href=\"https:\/\/s3vi.ndc.nasa.gov\/ssri-kb\/static\/resources\/High-Speed%20PCB%20Design%20Guide.pdf\" rel=\"noreferrer noopener\" target=\"_blank\">suurnopeusasetelmat<\/a>. Ne lis\u00e4\u00e4v\u00e4t my\u00f6s valmistuksen monimutkaisuutta.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/multilayer-PCB.webp\" alt=\"multilayer PCB\" class=\"wp-image-2792\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/multilayer-PCB.webp 600w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/multilayer-PCB-300x200.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-8-4-rigid-flex-and-rigid-flex\">4) J\u00e4ykk\u00e4, joustava ja j\u00e4ykk\u00e4-jousijoustava.<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>J\u00e4ykk\u00e4 PCB:<\/strong> vakiomuotoinen massiivilevy.<\/li>\n\n\n\n<li><strong>Flex PCB:<\/strong> ohut <a href=\"https:\/\/flj-pcb.com\/fi\/pcb-manufacturer\/flexible-pcb\/\" data-type=\"page\" data-id=\"1901\">joustavat piirit<\/a> k\u00e4ytet\u00e4\u00e4n puhelimissa, kameroissa, puettavissa laitteissa, ahtaissa tiloissa.<\/li>\n\n\n\n<li><strong>J\u00e4ykk\u00e4-joustava PCB:<\/strong> molempien yhdistelm\u00e4. Kalliimpi, mutta ratkaisee pakkausongelmat.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-9-5-high-frequency-high-speed-pcbs\">5) Korkean taajuuden \/ nopean nopeuden piirilevyt<\/h3>\n\n\n\n<p><a href=\"https:\/\/flj-pcb.com\/fi\/pcb-shielding-design-and-rf-shielding-guide\/\" data-type=\"post\" data-id=\"4844\">K\u00e4ytet\u00e4\u00e4n RF-, langattomiin, nopeisiin digitaalisiin liit\u00e4nt\u00f6ihin ja kaikkeen impedanssiherkk\u00e4\u00e4n.<\/a>. N\u00e4m\u00e4 tarvitsevat usein erikoismateriaaleja, joissa on <strong>alhainen dielektrinen h\u00e4vi\u00f6<\/strong>, kuten PTFE-pohjaiset laminaatit (ja muut, kuten polyuretaani, polyeteeni, polystyreenisekoitukset, riippuen tarkasta sovelluksesta ja valmistajan tarjonnasta).<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"372\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/High-Frequency-PCB.webp\" alt=\"High-Frequency PCB\" class=\"wp-image-2728\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/High-Frequency-PCB.webp 600w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/High-Frequency-PCB-300x186.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-10-6-special-boards-a-few-youll-hear-about\">6) Erityislautakunnat (muutama, joista kuulet)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Metalliydin PCB:<\/strong> joita k\u00e4ytet\u00e4\u00e4n l\u00e4mm\u00f6npoistoon ja vakauteen (yleisi\u00e4 LED-valaistuksessa ja tehoelektroniikassa).<\/li>\n\n\n\n<li><strong>Pinta-asennettava PCB:<\/strong> ei varsinaisesti \u201clautatyyppi\u201d, pikemminkin kokoonpanotyyli, mutta ihmiset sanovat niin. SMT tukee kevyit\u00e4, ohuita, suuria m\u00e4\u00e4ri\u00e4 ja alhaisempia kustannuksia.<\/li>\n\n\n\n<li><strong>Hiilikalvopainettu levy:<\/strong> k\u00e4ytet\u00e4\u00e4n silloin, kun kustannuksilla ja yksinkertaisella prosessilla on merkityst\u00e4.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-11-7-hdi-pcb\">7) HDI PCB<\/h3>\n\n\n\n<p><a href=\"https:\/\/flj-pcb.com\/fi\/pcb-manufacturer\/hdi-pcb\/\" data-type=\"page\" data-id=\"1915\">HDI on lyhenne sanoista high density interconnect<\/a>. Pienemm\u00e4t l\u00e4piviennit, tiukemmat v\u00e4lit, suurempi johdotustiheys kuin tavanomaisilla piirilevyill\u00e4. K\u00e4ytet\u00e4\u00e4n puhelimissa, pienikokoisissa laitteissa, kehittyneiss\u00e4 tuotteissa.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"450\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/hdi-pcb.webp\" alt=\"hdi pcb\" class=\"wp-image-2703\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/hdi-pcb.webp 600w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/hdi-pcb-300x225.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-12-how-a-pcb-is-designed-high-level-but-real\">Miten piirilevy suunnitellaan (korkean tason, mutta todellinen)<\/h2>\n\n\n\n<p>Piirilevysuunnittelu ei ole vain viivojen piirt\u00e4mist\u00e4, kunnes se \u201cyhdistyy\u201d.<\/p>\n\n\n\n<p>Tyypillinen virtaus n\u00e4ytt\u00e4\u00e4 t\u00e4lt\u00e4:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Luo kaaviokuva<\/strong><\/li>\n\n\n\n<li>T\u00e4m\u00e4 on looginen piiri. Mik\u00e4 liittyy mihinkin, arvot, verkot, virtakiskot. \u201cAivosuunnitelma\u201d.<\/li>\n\n\n\n<li><strong>Luo tyhj\u00e4 PCB-asettelu<\/strong><\/li>\n\n\n\n<li>M\u00e4\u00e4rittele levyn muoto, kiinnitysrei\u00e4t, suojavy\u00f6hykkeet ja liittimien paikat.<\/li>\n\n\n\n<li><strong>Kaappaa ja linkit\u00e4 kaavio PCB:hen<\/strong><\/li>\n\n\n\n<li>Tuodaan komponentteja (jalanj\u00e4lki\u00e4) ja liitet\u00e4\u00e4n verkkoja, jotta piirilevy tiet\u00e4\u00e4, mit\u00e4 on liitett\u00e4v\u00e4.<\/li>\n\n\n\n<li><strong>PCB stack-up suunnittelu<\/strong><\/li>\n\n\n\n<li>Nykyaikaisissa malleissa 4-kerroksinen FR4 on hyvin yleinen. Pinoaminen vaikuttaa impedanssiin, s\u00e4hk\u00f6magneettiseen h\u00e4iri\u00f6\u00f6n ja valmistettavuuteen.<\/li>\n\n\n\n<li><strong>Suunnittelus\u00e4\u00e4nt\u00f6jen ja DFM-vaatimusten m\u00e4\u00e4rittely<\/strong><\/li>\n\n\n\n<li>J\u00e4ljen leveys, v\u00e4li, porakoot, rengasmainen rengas, juotosmaskin v\u00e4lys, impedanssikohteet. N\u00e4iden s\u00e4\u00e4nt\u00f6jen pit\u00e4isi vastata sit\u00e4, mit\u00e4 valmistaja voi todellisuudessa rakentaa. T\u00e4ss\u00e4 suunnittelijat puhuvat usein valmistajien kanssa ja saavat heid\u00e4n rajoituksensa.<\/li>\n\n\n\n<li><strong>Komponenttien sijoittelu<\/strong><\/li>\n\n\n\n<li>Aluksi se voi olla automaattista, mutta todellinen sijoittelu on yleens\u00e4 manuaalista: signaalin eheys, l\u00e4mp\u00f6, saavutettavuus, kokoonpanorajoitukset. Sijoittaminen on puolet taistelusta, rehellisesti sanottuna.<\/li>\n\n\n\n<li><strong>Reititys (johdotus)<\/strong><\/li>\n\n\n\n<li>J\u00e4ljet laaditaan ohjeiden mukaisesti. Suurnopeussuunnittelussa ratkaisija tai suunnitteluty\u00f6kalut voivat auttaa ohjaamaan j\u00e4ljen geometriaa kohdeimpedanssin saavuttamiseksi.<\/li>\n\n\n\n<li><strong>Tunnisteiden lis\u00e4\u00e4minen<\/strong><\/li>\n\n\n\n<li>Viittaustunnukset, napaisuusmerkit, testipisteet, tarrat, logot. Pieni\u00e4 asioita, jotka s\u00e4\u00e4st\u00e4v\u00e4t tunteja kokoonpanossa ja vianetsinn\u00e4ss\u00e4.<\/li>\n\n\n\n<li><strong>Suorita DRC-tarkastukset<\/strong><\/li>\n\n\n\n<li>Suunnittelus\u00e4\u00e4nt\u00f6jen tarkistus (DRC) havaitsee tilavuudet, puuttuvat liitokset ja outoja rikkomuksia.<\/li>\n\n\n\n<li><strong>Valmistustiedostojen luominen<\/strong><\/li>\n\n\n\n<li>Yleens\u00e4 Gerber (usein laajennettu Gerber) sek\u00e4 poraustiedostot, pinoamismuistiinpanot ja valmistuspiirustukset.<\/li>\n<\/ol>\n\n\n\n<p>Yleisi\u00e4 PCB-suunnitteluohjelmistoja ovat Altium Designer, OrCAD, Pads, KiCad ja Eagle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-13-how-a-pcb-board-is-manufactured-the-real-step-by-step-idea\">Miten piirilevy valmistetaan (todellinen vaiheittainen ajatus).<\/h2>\n\n\n\n<p>Jos et ole koskaan k\u00e4ynyt tietokonepahvikaupassa, se on tavallaan koukuttavaa. \u00c4\u00e4nekk\u00e4it\u00e4 koneita, kemikaalilinjoja, paneelipinoja ja tarkastusasemia. Suunnittelijat, jotka vierailevat valmistajilla, palaavat yleens\u00e4 n\u00f6yremmin takaisin, koska sen j\u00e4lkeen aletaan suunnitella valmistusta silm\u00e4ll\u00e4 pit\u00e4en.<\/p>\n\n\n\n<p>T\u00e4ss\u00e4 on tyypillinen piirilevyjen valmistusprosessi, yksinkertaistettuna mutta silti tarkkana.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-14-step-1-design-and-output\">Vaihe 1: Suunnittelu ja tuotos<\/h3>\n\n\n\n<p>Piirilevyn ulkoasu luodaan CAD-ohjelmistolla ja vied\u00e4\u00e4n tarkastusten j\u00e4lkeen, yleens\u00e4 muodossa <a href=\"https:\/\/www.creativehitech.com\/blog\/pcb-gerber-files-introduction-and-industrial-importance\/\" rel=\"noreferrer noopener\" target=\"_blank\">Gerber-tiedostot<\/a> (usein laajennettu Gerber). T\u00e4m\u00e4 on \u201ctotuuden l\u00e4hde\u201d valmistusta varten.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"533\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/Design-File-Handling.webp\" alt=\"Design File Handling\" class=\"wp-image-2910\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/Design-File-Handling.webp 400w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/09\/Design-File-Handling-225x300.webp 225w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-15-step-2-from-file-to-film\">Vaihe 2: Tiedostosta elokuvaksi<\/h3>\n\n\n\n<p>Piirtokone tulostaa valokuvakalvot piirilevysuunnitelmasta. Kalvoja k\u00e4ytet\u00e4\u00e4n kuvion siirt\u00e4miseen kuparille.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-16-step-3-printing-the-inner-layers\">Vaihe 3: Sisempien kerrosten tulostaminen<\/h3>\n\n\n\n<p>Monikerroksisissa levyiss\u00e4 sis\u00e4kerroksen kuparikuvio luodaan kuparifoliolle, joka on laminoitu alustaan (epoksihartsi + lasikuitu). Fotoresisti\u00e4 levitet\u00e4\u00e4n, valotetaan ja kehitet\u00e4\u00e4n, jotta oikea kuparikuvio voidaan muodostaa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-17-step-4-removing-the-unwanted-copper\">Vaihe 4: Ei-toivotun kuparin poistaminen<\/h3>\n\n\n\n<p>Kemialliset prosessit poistavat ylim\u00e4\u00e4r\u00e4isen kuparin, kun taas kovettunut resisti suojaa j\u00e4ljelle j\u00e4\u00e4v\u00e4\u00e4 kuparia. Sy\u00f6vytyksen j\u00e4lkeen resisti poistetaan liuottimella, jolloin j\u00e4ljelle j\u00e4\u00e4v\u00e4t puhtaat kuparipiirteet.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-18-step-5-layer-alignment-and-optical-inspection\">Vaihe 5: Kerrosten kohdistaminen ja optinen tarkastus<\/h3>\n\n\n\n<p>Kerrosten on oltava t\u00e4ydellisesti linjassa. Kohdistusly\u00f6ntej\u00e4 ja rekister\u00f6intireiki\u00e4 k\u00e4ytet\u00e4\u00e4n, ja optiset reik\u00e4koneet auttavat asettamaan kerrokset tarkasti paikoilleen.<\/p>\n\n\n\n<p>Sitten paneelit k\u00e4yv\u00e4t usein l\u00e4pi <a href=\"https:\/\/smta.org\/news\/710400\/PARMI-Sets-New-AOI-Standard-with-AI-Teaching-Wins-2025-Mexico-Technology-Award.htm\" rel=\"noreferrer noopener\" target=\"_blank\"><strong>automaattinen optinen tarkastus (AOI)<\/strong><\/a>. Laseranturi vertaa paneelia Gerber-tietoihin havaitakseen aukkoja, oikosulkuja tai kuvion virheit\u00e4.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"399\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/AOI-inspection.webp\" alt=\"AOI inspection\" class=\"wp-image-2265\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/AOI-inspection.webp 600w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/AOI-inspection-300x200.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-19-step-6-layer-up-and-bonding\">Vaihe 6: Layer-up ja liimaus<\/h3>\n\n\n\n<p>Levy on rakennettu kuin voileip\u00e4. Kuparifolion, prepregin (liimaushartsin) ja ydinmateriaalin kerrokset pinotaan p\u00e4\u00e4llekk\u00e4in, usein puristinlevyjen ja alumiinifolion avulla, ja puristetaan sitten tietokoneohjatussa liimauspuristimessa.<\/p>\n\n\n\n<p>T\u00e4ll\u00f6in monikerroksisesta piirilevyst\u00e4 tulee yksi kiinte\u00e4 yksikk\u00f6.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-20-step-7-drilling\">Vaihe 7: Poraus<\/h3>\n\n\n\n<p>Rei\u00e4t porataan komponenttien johtoja, kiinnityst\u00e4 ja l\u00e4pivientej\u00e4 varten. Kohteiden tunnistamiseen voidaan k\u00e4ytt\u00e4\u00e4 r\u00f6ntgenpaikantimia. CNC-porakoneet voivat toimia eritt\u00e4in nopeasti, sill\u00e4 niiden ilmak\u00e4ytt\u00f6iset karat voivat py\u00f6ritt\u00e4\u00e4 jopa noin 150 000 kierrosta minuutissa.<\/p>\n\n\n\n<p>Porauksen j\u00e4lkeen ylim\u00e4\u00e4r\u00e4inen kupari tai karkeat reunat voidaan puhdistaa profilointity\u00f6kaluilla.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"533\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/12\/About-PCB-Drill-Compensation_compressed.webp\" alt=\"About PCB Drill Compensation\" class=\"wp-image-4584\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/12\/About-PCB-Drill-Compensation_compressed.webp 800w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/12\/About-PCB-Drill-Compensation_compressed-300x200.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/12\/About-PCB-Drill-Compensation_compressed-768x512.webp 768w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/12\/About-PCB-Drill-Compensation_compressed-18x12.webp 18w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-21-step-8-plating-chemical-deposition\">Vaihe 8: pinnoitus (kemiallinen laskeuma)<\/h3>\n\n\n\n<p>Paneelin pintaan ja porattujen reikien sis\u00e4puolelle levitet\u00e4\u00e4n ohut kuparikerros, jotta l\u00e4piviennit voivat johtaa s\u00e4hk\u00f6\u00e4 kerrosten v\u00e4lill\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-22-step-9-outer-layer-imaging\">Vaihe 9: Ulomman kerroksen kuvantaminen<\/h3>\n\n\n\n<p>Paneeliin levitet\u00e4\u00e4n uusi fotoresisti. UV-altistus kovettaa resistin, johon kuparin pit\u00e4isi j\u00e4\u00e4d\u00e4. Kovettumaton resisti poistetaan koneellisesti.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-23-step-10-outer-layer-plating-electroplating\">Vaihe 10: Ulomman kerroksen pinnoitus (galvanointi)<\/h3>\n\n\n\n<p>Levy on galvanoitu kuparilla, jotta j\u00e4lkien ja l\u00e4pivientien paksuus kasvaisi, mink\u00e4 j\u00e4lkeen se on usein p\u00e4\u00e4llystetty tinalla kuparin suojaamiseksi sy\u00f6vytyksen aikana.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-24-step-11-final-etching\">Vaihe 11: Lopullinen sy\u00f6vytys<\/h3>\n\n\n\n<p>Kemialliset liuokset poistavat ylim\u00e4\u00e4r\u00e4isen kuparin. Tina suojaa haluttuja kupariominaisuuksia. Sy\u00f6vytyksen j\u00e4lkeen tina poistetaan tarpeen mukaan.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-25-step-12-solder-mask-application\">Vaihe 12: Juotosmaskin levitys<\/h3>\n\n\n\n<p>Epoksijuotosmaskin muste levitet\u00e4\u00e4n molemmille puolille, mink\u00e4 j\u00e4lkeen se kovetetaan UV-valolla. Monet levyt kovetetaan my\u00f6s uunissa t\u00e4ydellisen kovuuden saavuttamiseksi.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Green-Solder-Mask-Immersion-Hard-Gold-PCB.webp\" alt=\"Green Solder Mask Immersion Hard Gold PCB\" class=\"wp-image-2815\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Green-Solder-Mask-Immersion-Hard-Gold-PCB.webp 500w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Green-Solder-Mask-Immersion-Hard-Gold-PCB-300x300.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Green-Solder-Mask-Immersion-Hard-Gold-PCB-150x150.webp 150w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-26-step-13-surface-finish\">Vaihe 13: Pintak\u00e4sittely<\/h3>\n\n\n\n<p>Tyynyt tarvitsevat viimeistelyn, jotta ne juottuvat hyvin eiv\u00e4tk\u00e4 hapetu. Vaihtoehtoja ovat mm:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kemiallinen pinnoitus kullalla (kuten ENIG) tai hopealla.<\/li>\n\n\n\n<li>Kuumailmapohjustus (HASL), jolla tyynyist\u00e4 saadaan tasalaatuisia.<\/li>\n<\/ul>\n\n\n\n<p>Pintak\u00e4sittelyvaihtoehtoja on useita riippuen kustannuksista, s\u00e4ilyvyydest\u00e4 ja kokoonpanomenetelm\u00e4st\u00e4.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-27-step-14-silkscreen\">Vaihe 14: Silkkipaino<\/h3>\n\n\n\n<p>Mustesuihku- tai silkkipainatuksella lis\u00e4t\u00e4\u00e4n elint\u00e4rke\u00e4t tiedot: viitetunnukset, komponenttien \u00e4\u00e4riviivat, napaisuus, logot, varoitukset.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-28-step-15-electrical-test\">Vaihe 15: S\u00e4hk\u00f6testi<\/h3>\n\n\n\n<p>Levyt testataan aukkojen ja oikosulkujen varalta. Yksi yleinen menetelm\u00e4 on <a href=\"https:\/\/www.sfcircuits.com\/pcb-school\/flying-probe-test\" rel=\"noreferrer noopener\" target=\"_blank\"><strong>Lent\u00e4v\u00e4n koettimen testaus<\/strong><\/a>, joka tarkistaa s\u00e4hk\u00f6isen suorituskyvyn ilman mukautettua testilaitetta.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-29-step-16-profiling-and-v-scoring\">Vaihe 16: Profilointi ja V-pisteytys<\/h3>\n\n\n\n<p>Levyn lopullinen \u00e4\u00e4riviiva leikataan jyrsimell\u00e4 tai siihen lis\u00e4t\u00e4\u00e4n V-urat, jotta levyt voidaan napsauttaa siististi erilleen paneelivalmistusta varten.<\/p>\n\n\n\n<p>Sitten tapahtuu pakkaaminen, usein tyhji\u00f6pakkaus suojaamiseksi, ja sitten l\u00e4hetys.<\/p>\n\n\n\n<p>Se on ydinajatus. Jotkin tehtaat lis\u00e4\u00e4v\u00e4t lis\u00e4vaiheita teknologiasta riippuen (HDI, sokeat\/hautetut l\u00e4piviennit, kontrolloidut impedanssikupongit jne.).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-30-pcbs-and-modern-wireless-high-frequency-stuff\">Piirilevyt ja nykyaikaiset langattomat, suurtaajuusmateriaalit<\/h2>\n\n\n\n<p>Elektroniikka on nyky\u00e4\u00e4n paljon \u201csignaaleja, jotka k\u00e4ytt\u00e4ytyv\u00e4t kuin radio\u201d, vaikka et uskoisi niin. Nopeat digitaaliset reunat, langaton l\u00e4hetys, \u00e4\u00e4ni, video, data. Kaikella on standardit, ja piirilevyll\u00e4 monet n\u00e4ist\u00e4 suorituskykytaisteluista voitetaan tai h\u00e4vit\u00e4\u00e4n.<\/p>\n\n\n\n<p>Uuden sukupolven tuotteet ty\u00f6nt\u00e4v\u00e4t usein:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>korkeamman taajuuden levyt<\/li>\n\n\n\n<li>matalan dielektrisen h\u00e4vi\u00f6n substraatit<\/li>\n\n\n\n<li>tiukemmat toleranssit<\/li>\n\n\n\n<li><a href=\"https:\/\/www.allpcb.com\/allelectrohub\/understanding-impedance-control-in-pcb-routing-best-practices-and-guidelines\" target=\"_blank\" rel=\"noreferrer noopener\">impedanssiohjattu reititys<\/a><\/li>\n<\/ul>\n\n\n\n<p>Jos teet RF-, suurnopeusliit\u00e4nt\u00f6j\u00e4 tai tiheit\u00e4 asetteluja, et yleens\u00e4 voi k\u00e4sitell\u00e4 piirilevy\u00e4 j\u00e4lkik\u00e4teen. Siit\u00e4 tulee osa j\u00e4rjestelm\u00e4\u00e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-31-so-what-is-a-pcb-board-really\">Mik\u00e4 PCB-levy oikeastaan on?<\/h2>\n\n\n\n<p>Se on valmistettu alusta, joka tekee kaksi ty\u00f6t\u00e4 kerralla:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Reititt\u00e4\u00e4 s\u00e4hk\u00f6isi\u00e4 signaaleja ja virtaa<\/strong> kuparireittien kautta.<\/li>\n\n\n\n<li><strong>Tukee ja suojaa piiri\u00e4 mekaanisesti<\/strong> jotta se voidaan koota, l\u00e4hett\u00e4\u00e4, k\u00e4ytt\u00e4\u00e4 ja tuottaa luotettavasti.<\/li>\n<\/ol>\n\n\n\n<p>Siin\u00e4 kaikki. Mutta se on my\u00f6s syy, miksi piirilevyt hallitsevat maailmaa hiljaa.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-32-need-a-reliable-pcb-board-made\">Tarvitsetko luotettavan PCB-levyn?<\/h2>\n\n\n\n<p>Tarvitsetko luotettavan PCB-levyn seuraavaan projektiisi? Osoitteessa <strong>Philifast<\/strong>, Tarjoamme korkealaatuista PCB-valmistusta, jolla on vakaa suorituskyky, nopea l\u00e4pimenoaika ja ammattimainen tuki. Tarvitsitpa sitten prototyyppilevyj\u00e4 tai massatuotantoa, tiimimme on valmis auttamaan sinua toteuttamaan suunnittelusi. K\u00e4y osoitteessa <a href=\"https:\/\/flj-pcb.com\/fi\/\" data-type=\"page\" data-id=\"6\"><strong><strong>Philifast<\/strong><\/strong> <\/a>saadaksesi tarjouksen t\u00e4n\u00e4\u00e4n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"heading-33-faqs-frequently-asked-questions\">FAQ (usein kysytyt kysymykset)<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-34-what-is-a-pcb-board-and-why-is-it-important-in-electronics\">Mik\u00e4 on piirilevy ja miksi se on t\u00e4rke\u00e4 elektroniikassa?<\/h3>\n\n\n\n<p>PCB-levy eli painettu piirilevy on eristetty levy, jossa on johtavia kuparikanavia, jotka yhdist\u00e4v\u00e4t elektroniset komponentit toisiinsa. Se toimii nykyaikaisen elektroniikan selk\u00e4rankana ohjaamalla virtaa ja signaaleja sinne, miss\u00e4 niit\u00e4 tarvitaan, ja pit\u00e4m\u00e4ll\u00e4 samalla komponentit mekaanisesti paikoillaan, jotta v\u00e4ltyt\u00e4\u00e4n herkilt\u00e4 johtosotkuilta. Piirilevyt ovat v\u00e4ltt\u00e4m\u00e4tt\u00f6mi\u00e4, koska ne mahdollistavat piirien yhdist\u00e4misen, rakenteellisen tuen, suojan oikosulkuja ja kontaminaatiota vastaan, tuotannon tehokkuuden, huollon helppouden ja laitteiden tihe\u00e4n integroinnin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-35-what-does-pcb-stand-for-and-how-is-it-different-from-pwb-and-pcba\">Mit\u00e4 PCB tarkoittaa ja miten se eroaa PWB:st\u00e4 ja PCBA:sta?<\/h3>\n\n\n\n<p>PCB tarkoittaa painettua piirilevy\u00e4. PWB tarkoittaa painettua piirilevy\u00e4 ja viittaa usein paljaaseen piirilevyyn ennen komponenttien kokoamista. PCBA tarkoittaa painetun piirilevyn kokoonpanoa eli piirilevy\u00e4 sen j\u00e4lkeen, kun komponentit on sijoitettu ja juotettu. Vaikka n\u00e4it\u00e4 termej\u00e4 k\u00e4ytet\u00e4\u00e4n joskus arkikeskusteluissa vaihdellen, ne korostavat piirilevyjen eri vaiheita tai n\u00e4k\u00f6kohtia.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-36-what-materials-are-commonly-used-to-make-a-pcb\">Mit\u00e4 materiaaleja k\u00e4ytet\u00e4\u00e4n yleisesti piirilevyjen valmistuksessa?<\/h3>\n\n\n\n<p>Yleisimm\u00e4t piirilevyt on valmistettu useista kerroksista, mukaan lukien: perusmateriaali (substraatti) yleens\u00e4 FR4, joka on kudottu lasikuitu yhdistettyn\u00e4 epoksihartsiin; ohut kuparifolio, joka on liimattu substraattiin, joka on sy\u00f6vytetty j\u00e4lkiin; juotospeitekerros (usein vihre\u00e4), joka suojaa kuparia korroosiolta ja est\u00e4\u00e4 juotosillat; silkkipainatus komponenttien etikettej\u00e4 ja merkint\u00f6j\u00e4 varten; ja pintak\u00e4sittely, kuten HASL- tai ENIG-j\u00e4\u00e4hdytys luotettavan juottamisen varmistamiseksi ja hapettumisen est\u00e4miseksi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-37-how-do-the-copper-traces-pads-and-vias-function-on-a-pcb\">Miten kuparij\u00e4ljet, tyynyt ja l\u00e4piviennit toimivat piirilevyss\u00e4?<\/h3>\n\n\n\n<p>Piirilevyn kuparij\u00e4ljet toimivat kuin tiet, jotka ohjaavat s\u00e4hk\u00f6virtaa ja signaaleja komponenttien (rakennusten) v\u00e4lill\u00e4. Tyynyt toimivat parkkipaikkoina, joilla osat juotetaan levylle turvallisesti. Viat toimivat hissin\u00e4, jotka siirt\u00e4v\u00e4t signaaleja monikerroksisen piirilevyn eri kerrosten v\u00e4lill\u00e4. N\u00e4iden v\u00e4ylien huolellinen suunnittelu - mukaan lukien leveys, v\u00e4lykset ja reititys - vaikuttaa suoraan piirin suorituskykyyn erityisesti nopeissa tai korkeataajuisissa malleissa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-38-what-are-the-common-types-of-pcbs-used-in-electronic-devices\">Mink\u00e4 tyyppisi\u00e4 piirilevyj\u00e4 k\u00e4ytet\u00e4\u00e4n yleisesti elektroniikkalaitteissa?<\/h3>\n\n\n\n<p>Yleisi\u00e4 piirilevytyyppej\u00e4 ovat: yksipuoliset piirilevyt, joissa on kupari toisella puolella ja joita k\u00e4ytet\u00e4\u00e4n yksinkertaisessa elektroniikassa; kaksipuoliset piirilevyt, joissa on kupari molemmilla puolilla, jotka on yhdistetty l\u00e4pivienneill\u00e4, jotka tarjoavat enemm\u00e4n reititystilaa; monikerroksiset piirilevyt, joissa on kolme tai useampia kerroksia, jotka mahdollistavat puhtaamman reitityksen ja v\u00e4hent\u00e4v\u00e4t kohinaa nykyaikaisissa laitteissa; j\u00e4yk\u00e4t piirilevyt, jotka ovat kiinteit\u00e4 levyj\u00e4; joustavat piirilevyt, jotka ovat ohuita ja joustavia ahtaisiin tiloihin, kuten puhelimiin; j\u00e4yk\u00e4t joustavat piirilevyt, joissa yhdistyv\u00e4t sek\u00e4 j\u00e4yk\u00e4t ett\u00e4 joustavat osiot, ja korkeataajuus- \/ nopeat piirilevyt, joissa on erikoismateriaaleja, jotka on tarkoitettu k\u00e4sittelem\u00e4\u00e4n RF-, langatonta tai nopeaa digitaalista signaaleja.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"heading-39-why-do-modern-electronics-often-use-multilayer-pcbs-instead-of-single-or-double-sided-ones\">Miksi nykyaikaisessa elektroniikassa k\u00e4ytet\u00e4\u00e4n usein monikerroksisia piirilevyj\u00e4 yksi- tai kaksipuoleisten sijaan?<\/h3>\n\n\n\n<p>Nykyaikaisessa elektroniikassa k\u00e4ytet\u00e4\u00e4n monikerroksisia piirilevyj\u00e4, koska niiss\u00e4 on lis\u00e4kerroksia signaalin reitityst\u00e4, virranjakelua ja maadoitusta varten, mik\u00e4 johtaa puhtaampiin layouteihin ja v\u00e4hent\u00e4\u00e4 s\u00e4hk\u00f6ist\u00e4 kohinaa. Monikerroslevyt tukevat kehittyneiden laitteiden edellytt\u00e4mi\u00e4 nopeita asetteluja, koska ne mahdollistavat hienot j\u00e4ljet ja pienet l\u00e4piviennit. Vaikka monikerroksiset piirilevyt lis\u00e4\u00e4v\u00e4t valmistuksen monimutkaisuutta ja kustannuksia verrattuna yksi- tai kaksipuolisiin levyihin, ne ovat v\u00e4ltt\u00e4m\u00e4tt\u00f6mi\u00e4 tihe\u00e4n integroinnin ja luotettavan suorituskyvyn kannalta monimutkaisissa elektronisissa j\u00e4rjestelmiss\u00e4.<\/p>","protected":false},"excerpt":{"rendered":"<p>If you\u2019ve ever used a digital clock, calculator, TV remote, router, laptop, or even a kid\u2019s toy, you\u2019ve used a [&hellip;]<\/p>","protected":false},"author":1,"featured_media":4896,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-breadcrumbs-content":"","ast-featured-img":"","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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[30],"tags":[163,37,29,53],"class_list":["post-4895","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pcb-manufacturers","tag-multilayer-pcb","tag-pcb-design","tag-pcb-manufacturers","tag-pcb-manufacturing"],"spectra_custom_meta":{"_edit_lock":["1778230674:1"],"rank_math_internal_links_processed":["1"],"rank_math_primary_category":["30"],"rank_math_seo_score":["84"],"rank_math_title":["What Is a PCB Board? 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