{"id":4685,"date":"2026-01-27T08:21:43","date_gmt":"2026-01-27T08:21:43","guid":{"rendered":"https:\/\/flj-pcb.com\/?p=4685"},"modified":"2026-01-27T08:21:46","modified_gmt":"2026-01-27T08:21:46","slug":"pcb-substrate-classification-and-material-properties","status":"publish","type":"post","link":"https:\/\/flj-pcb.com\/fi\/pcb-substrate-classification-and-material-properties\/","title":{"rendered":"PCB-alustan luokittelu ja materiaaliominaisuudet"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Abstrakti<\/h2>\n\n\n\n<p>T\u00e4ss\u00e4 asiakirjassa selitet\u00e4\u00e4n viestint\u00e4tuotteissa k\u00e4ytett\u00e4vien piirilevyjen (PCB) luokittelu, materiaalivalinnat, teknologiset suuntaukset, suunnittelus\u00e4\u00e4nn\u00f6t ja k\u00e4sittelystandardit. Se on tarkoitettu piirilevysuunnittelijoiden ja prosessisuunnittelijoiden k\u00e4ytt\u00f6\u00f6n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Painettujen piirilevyjen tarkoitus ja toiminta<\/h2>\n\n\n\n<p>Elektronisissa viestint\u00e4j\u00e4rjestelmiss\u00e4 k\u00e4ytet\u00e4\u00e4n monia painettuja piirilevyj\u00e4. N\u00e4m\u00e4 levyt ovat laitteiston toiminnallisia osia. Ne ovat kuin elimet kehossa. J\u00e4rjestelm\u00e4n tai p\u00e4\u00e4telaitteen piirilevyt kuljettavat virtapiirej\u00e4. Ne muodostavat rungon, johdotuksen sek\u00e4 virran ja signaalien kulkureitit.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Painettujen piirilevyjen tyypit<\/h2>\n\n\n\n<p>Luokittele PCB:t k\u00e4yt\u00f6n ja teknologian mukaan. Rakenteen ja toiminnon mukaan on olemassa yksipuolisia levyj\u00e4, kaksipuolisia levyj\u00e4 ja piirilevyj\u00e4. <a href=\"https:\/\/flj-pcb.com\/fi\/pcb-manufacturer\/multilayer-pcb\/\" data-type=\"page\" data-id=\"2630\">monikerroksiset levyt<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PCB-alustan materiaalityypit ja ominaisuudet<\/h2>\n\n\n\n<p>Alustamateriaalit jaetaan j\u00e4ykkiin alustoihin ja joustaviin alustoihin. J\u00e4ykkiin piirilevyihin kuuluvat kuparip\u00e4\u00e4llysteiset fenolipaperilaminaatit, kuparip\u00e4\u00e4llysteiset epoksipaperilaminaatit ja kuparip\u00e4\u00e4llysteiset epoksilasikuitulaminaatit. N\u00e4iss\u00e4 k\u00e4ytet\u00e4\u00e4n sideaineena fenolihartsia tai epoksihartsia. Vahvikkeena k\u00e4ytet\u00e4\u00e4n paperia tai alkalivapaata lasikangasta. Kun yksi tai kaksi puolta on p\u00e4\u00e4llystetty kuparifoliolla, niist\u00e4 tulee s\u00e4hk\u00f6\u00e4 erist\u00e4vi\u00e4 laminaatteja.<\/p>\n\n\n\n<p>N\u00e4iden substraattimateriaalien ominaisuuksien on t\u00e4ytett\u00e4v\u00e4 laajalti tunnustetut kansainv\u00e4liset standardit, kuten seuraavat <strong>IPC-4101<\/strong> (j\u00e4ykkien ja monikerroksisten painettujen piirilevyjen perusmateriaalien eritelm\u00e4) ja asiaankuuluvat standardit. <strong>IEC<\/strong> julkaisut; liekinkest\u00e4vyys todennetaan yleisesti seuraavilla menetelmill\u00e4 <strong>UL 94<\/strong> pystysuora palamisluokitus ja <strong>NEMA LI-1 \/ FR-4<\/strong> nimityst\u00e4 k\u00e4ytet\u00e4\u00e4n kansainv\u00e4lisesti lasi-epoksilaminaattien tunnistamiseen. Kun m\u00e4\u00e4rittelet materiaaleja maailmanlaajuista valmistusta varten, viittaa IPC:n \u201cslash-sheets\u201d (tarkat hartsi\/kankaan\/kuparin yhdistelm\u00e4t) tai IEC-tunnisteisiin, jotta toimittajat ja valmistajat voivat maailmanlaajuisesti l\u00f6yt\u00e4\u00e4 vastaavat varastoidut tuotteet ja varmistaa yhdenmukaisen suorituskyvyn.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 Kupari-Clad epoksi lasikuitulaminaatti<\/h3>\n\n\n\n<p>T\u00e4ss\u00e4 laminaatissa k\u00e4ytet\u00e4\u00e4n sideaineena epoksihartsia ja vahvistuksena lasikuitukangasta. Sill\u00e4 on parempi mekaaninen lujuus, mittapysyvyys ja iskunkest\u00e4vyys kuin paperilaminaateilla. Dielektrisyysvakio \u03b5 on <a href=\"https:\/\/flj-pcb.com\/fi\/fr-4-pcb-guide-properties-limits-material-choices\/\" data-type=\"post\" data-id=\"4641\">FR4<\/a> ja FR5 on v\u00e4lill\u00e4 4,3-4,9. Niiden s\u00e4hk\u00f6iset ominaisuudet ovat hyv\u00e4t. Ne voivat toimia korkeammissa l\u00e4mp\u00f6tiloissa. FR4 toimii 130 \u2103:iin ja FR5 170 \u2103:iin. Kosteus vaikuttaa niihin v\u00e4hemm\u00e4n. Siksi niit\u00e4 k\u00e4ytet\u00e4\u00e4n laajalti viestint\u00e4laitteissa.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"542\" height=\"544\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/10\/fr4.webp\" alt=\"fr4\" class=\"wp-image-4044\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/10\/fr4.webp 542w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/10\/fr4-300x300.webp 300w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/10\/fr4-150x150.webp 150w\" sizes=\"(max-width: 542px) 100vw, 542px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 Monikerroslevyjen epoksilasi-kuituliimauslevyt (prepreg)<\/h3>\n\n\n\n<p>N\u00e4m\u00e4 ovat lasikangasmateriaaleja, jotka on esik\u00e4sitelty B-vaiheen epoksihartsilla. K\u00e4yt\u00e4 niit\u00e4 monikerroksisten levyjen valmistukseen. Ne liimaavat erilliset <a href=\"https:\/\/flj-pcb.com\/fi\/pcb-manufacturer\/single-sided-pcb\/\" data-type=\"page\" data-id=\"2625\">yksikerroksinen<\/a> tai kaksikerroksisia johtavia kuviolevyj\u00e4 yhdess\u00e4. Laminoinnin j\u00e4lkeen ne toimivat dielektrisin\u00e4 eristekerroksina. Ne valmistetaan kyll\u00e4st\u00e4m\u00e4ll\u00e4 alkalivapaa lasikangas epoksilla. Hartsi kovetetaan B-vaiheeseen. Lopullisen puristuksen ja muotoilun j\u00e4lkeen epoksi kovettuu t\u00e4ysin. Tuloksena on j\u00e4ykk\u00e4 monikerroksinen piirilevy.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.3 Itsest\u00e4\u00e4n sammuvat (liekinkest\u00e4v\u00e4t) kuparilevylaminaatit<\/h3>\n\n\n\n<p>N\u00e4ill\u00e4 materiaaleilla on samat perusominaisuudet kuin muilla kuparip\u00e4\u00e4llysteisill\u00e4 laminaateilla. Ne kest\u00e4v\u00e4t my\u00f6s tulta. Ne v\u00e4hent\u00e4v\u00e4t ylikuumentuneesta komponentista aiheutuvaa syttymisriski\u00e4. Ne my\u00f6s rajoittavat pienen palon levi\u00e4mist\u00e4. K\u00e4yt\u00e4 niit\u00e4 siell\u00e4, miss\u00e4 tarvitaan paloturvallisuutta.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.4 Kuparoidut PTFE (teflon) lasikuitulevyt<\/h3>\n\n\n\n<p>Kuparip\u00e4\u00e4llysteisiss\u00e4 PTFE-levyiss\u00e4 k\u00e4ytet\u00e4\u00e4n PTFE:t\u00e4 (teflonia) sideaineena ja lasikuitua lujitteena. Niiden dielektriset ominaisuudet ovat erinomaiset. Niiden dielektrinen h\u00e4vi\u00f6 on alhainen ja tangenttih\u00e4vi\u00f6 (tg\u03b4) on suuruusluokkaa 10-\u00b3. Niiden dielektrisyysvakioalue on laaja. Voit valita erilaisia perusmateriaaleja tarpeiden mukaan. Ne kest\u00e4v\u00e4t korkeita l\u00e4mp\u00f6tiloja ja kosteutta. Niill\u00e4 on hyv\u00e4 kemiallinen stabiilisuus. Ne toimivat laajalla l\u00e4mp\u00f6tila-alueella. N\u00e4m\u00e4 ominaisuudet tekev\u00e4t niist\u00e4 ihanteellisia suurtaajuus- ja mikroaaltoviestinn\u00e4n piirilevyille.<\/p>\n\n\n\n<p>PTFE-levyt maksavat kuitenkin enemm\u00e4n. Ne ovat v\u00e4hemm\u00e4n j\u00e4ykki\u00e4. Kuparifolion tartuntalujuus on pienempi. T\u00e4m\u00e4 vaikeuttaa monikerroslevyjen rakentamista. Yleisi\u00e4 PTFE-piirilevypohjamateriaaleja ovat Rogers, Taconic, Arlon, Metclad ja GIL.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.5 Kuparoidut metalliytimelliset PCB:t<\/h3>\n\n\n\n<p>N\u00e4iss\u00e4 piirilevyiss\u00e4, joita kutsutaan my\u00f6s metalliydinpiirilevyiksi, k\u00e4ytet\u00e4\u00e4n lasikuituvahvisteisten materiaalien sijasta eri paksuisia metallilevyj\u00e4, yleens\u00e4 alumiinia. Erikoisk\u00e4sittelyn j\u00e4lkeen metallipinta peitet\u00e4\u00e4n dielektrisell\u00e4 kerroksella. Dielektrisell\u00e4 kerroksella on alhainen l\u00e4mm\u00f6nkest\u00e4vyys, hyv\u00e4 eristys ja vahva sidos. T\u00e4m\u00e4n j\u00e4lkeen dielektriseen pintaan liimataan halutun paksuinen kuparifolio.<\/p>\n\n\n\n<p>Metalliydinpiirilevyj\u00e4 k\u00e4ytet\u00e4\u00e4n tihe\u00e4\u00e4n kokoonpanoon ja suureen tehotiheyteen. K\u00e4yt\u00e4 niit\u00e4 tehopiireihin, joissa on suuri h\u00e4vi\u00f6. Niiden etuina ovat hyv\u00e4 l\u00e4mm\u00f6nhukka ja hyv\u00e4 mittapysyvyys. Metallipohja tarjoaa my\u00f6s suojauksen. Nykyisiss\u00e4 tuotteissa k\u00e4ytet\u00e4\u00e4n Bergquistin kaltaisten toimittajien ja tutkimuslaitosten, kuten tietoteollisuusministeri\u00f6n instituutin 51, materiaaleja.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.6 Joustavat PCB-alustamateriaalit<\/h3>\n\n\n\n<p><a href=\"https:\/\/flj-pcb.com\/fi\/pcb-manufacturer\/flexible-pcb\/\" data-type=\"page\" data-id=\"1901\">Joustava PCB<\/a> substraatit valmistetaan liimaamalla kuparifolio ohueen muovikalvoon. Yleisi\u00e4 muovikalvopohjamateriaaleja ovat:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"400\" height=\"364\" src=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Stiffeners-for-flexible-PCBs.webp\" alt=\"flexible PCB\" class=\"wp-image-1969\" srcset=\"https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Stiffeners-for-flexible-PCBs.webp 400w, https:\/\/flj-pcb.com\/wp-content\/uploads\/2025\/08\/Stiffeners-for-flexible-PCBs-300x273.webp 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n\n\n\n<p>(1) Polyesterikalvo. Ty\u00f6l\u00e4mp\u00f6tila on 80 \u2103 - 130 \u2103. Sill\u00e4 on alhainen sulamispiste. Se pehmenee ja muotoutuu juotosl\u00e4mp\u00f6tiloissa.<\/p>\n\n\n\n<p>(2) Polyimidikalvo. Sill\u00e4 on hyv\u00e4 joustavuus. Poista imeytynyt kosteus l\u00e4mp\u00f6k\u00e4sittelyll\u00e4 ennen juottamista. Kuivauksen j\u00e4lkeen se voidaan juottaa turvallisesti. Yleinen liimaustyyppinen polyimidikalvo voi toimia jatkuvasti 150 \u2103:ssa. Polyimidimateriaali, jossa k\u00e4ytet\u00e4\u00e4n FEP:t\u00e4 v\u00e4likalvona ja erityist\u00e4 fuusioliimaa, voi toimia 250 \u2103:ssa.<\/p>\n\n\n\n<p>(3) Fluorattu eteenipropyleenikalvo (FEP). K\u00e4ytet\u00e4\u00e4n usein polyimidin ja lasikangaskalvon kanssa. Sill\u00e4 on hyv\u00e4 joustavuus. Kest\u00e4\u00e4 paremmin kosteutta, happoja ja liuottimia.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PCB-teknologian kehityksen t\u00e4rkeimm\u00e4t suuntaukset<\/h2>\n\n\n\n<p>Piirilevykehityksen t\u00e4rkein suuntaus on suurempi tiheys. Keinoja tiheyden saavuttamiseksi ovat hienot linjat, pienet l\u00e4pivientirei\u00e4t, useammat kerrokset, sokeat l\u00e4piviennit ja upotetut l\u00e4piviennit. Yleinen prosessi suuren tiheyden (HDI) saavuttamiseksi on buildup multilayer (BUM) -tekniikka.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u00e4rkeimm\u00e4t suorituskykyindeksit ja kuparifolion paksuuden valinta kupari-epoksiepoksi-lasikuitulaminaatille<\/h2>\n\n\n\n<p>Paksuuden ja kuparifolion paksuuden lis\u00e4ksi laminaateilla on muitakin ominaisuuksia. N\u00e4it\u00e4 ovat esimerkiksi kuorintalujuus, v\u00e4\u00e4ntyminen, dielektrinen lujuus, eristysresistanssi, dielektrisyysvakio, dielektrinen h\u00e4vi\u00f6tangentti, l\u00e4mp\u00f6shokkikest\u00e4vyys, kosteuden imeytyminen ja palonesto. Kuparip\u00e4\u00e4llysteisten epoksilasikuitulaminaattien teknisten vaatimusten on oltava GB\/T4725:n mukaisia.<\/p>\n\n\n\n<p>Kuparifolion paksuudella on suuri vaikutus painettujen johtimien tarkkuuteen ja johtimen v\u00e4himm\u00e4isleveyteen valmistuksessa. Yleiss\u00e4\u00e4nt\u00f6 on: mit\u00e4 paksumpi kupari, sit\u00e4 suurempi sy\u00f6vytysalaleikkaus. Painettu johdin kapenee enemm\u00e4n. Kun johtimen leveydest\u00e4 tulee liian pieni, sit\u00e4 ei voida valmistaa. Kun siis asetat piirilevyn pienint\u00e4 johtimen leveytt\u00e4, ota huomioon kuparin paksuus virran, reititystiheyden ja muiden s\u00e4\u00e4nt\u00f6jen lis\u00e4ksi.<\/p>\n\n\n\n<p>Tiedot osoittavat, ett\u00e4 35 \u03bcm:n kuparifoliolla johtimen leveyden pit\u00e4isi olla yli 0,15 mm. 18 \u03bcm:n kuparifoliolla johtimen leveyden olisi oltava yli 0,1 mm.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PCB Outline valinta, paksuus ja yhden levyn koko<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">6.1 Yhden piirilevyn \u00e4\u00e4riviivojen valinta<\/h3>\n\n\n\n<p>Piirilevyiss\u00e4 k\u00e4ytet\u00e4\u00e4n yleens\u00e4 suorakulmiota, jonka pituus ja leveys ovat samankaltaiset. V\u00e4lt\u00e4 parittoman muotoisia levyj\u00e4. Linjan siirt\u00e4misen ja telineisiin asettamisen helpottamiseksi kulmissa voidaan k\u00e4ytt\u00e4\u00e4 pieni\u00e4 py\u00f6reit\u00e4 kaaria tai viisteit\u00e4.<\/p>\n\n\n\n<p>Hyvin pienet levyt (esimerkiksi alle 100 mm \u00d7 100 mm:n kokoiset levyt) olisi paneloitava. Jos useilla yhden tuotteen levytyypeill\u00e4 on sama kerrosluku, sama paksuus ja dielektriset kerrokset, sama kuparin paksuus ja sama m\u00e4\u00e4r\u00e4, ne yhdistet\u00e4\u00e4n yhdeksi paneeliksi.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6.2 PCB-paksuus<\/h3>\n\n\n\n<p>Valitse levyn paksuus toiminnon, komponenttimassan, yhteensopivien liittimien spesifikaatioiden, levyn koon ja mekaanisen kuormituksen mukaan. Kun kyseess\u00e4 ovat suuret levyt, jotka taipuvat helposti, lis\u00e4\u00e4 kylkiluut tai kehykset niiden vahvistamiseksi.<\/p>\n\n\n\n<p>Alle 300 mm \u00d7 250 mm:n levyiss\u00e4 yleinen paksuus on 1,6 mm. Taustalevyjen ja suurempien yksitt\u00e4isten piirilevyjen tulisi olla paksumpia kuin 2 mm. Puristimen kapasiteetti rajoittaa kuitenkin k\u00e4sittely\u00e4. Paksuuden tulisi yleens\u00e4 olla alle 4 mm.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6.3 Piirilevyn ulkoiset mitat Sarja<\/h3>\n\n\n\n<p>Jos piirilevyj\u00e4 ei ole sijoitettu telineeseen, katso GB9315 levyn mittasarjaa varten. Kaapeissa reunaliittimill\u00e4 varustetut pistokepohjaiset piirilevyt ovat yleisi\u00e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Huomautuksia ja yksinkertaisia neuvoja<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Valitse materiaalit, jotka t\u00e4ytt\u00e4v\u00e4t standardit ja jotka valmistaja voi varastoida. T\u00e4m\u00e4 v\u00e4hent\u00e4\u00e4 viiveit\u00e4.<\/li>\n\n\n\n<li>K\u00e4yt\u00e4 PTFE-pohjaista materiaalia suurtaajuuslevyiss\u00e4, kun tarvitset alhaisia h\u00e4vi\u00f6it\u00e4 ja vakaata dielektrisyysvakiota. Tarkista kustannukset ja rakentamisrajat.<\/li>\n\n\n\n<li>L\u00e4mp\u00f6kriittisten teholevyjen osalta kannattaa harkita metalliydinlevyj\u00e4, jotta l\u00e4mp\u00f6 jakautuu paremmin.<\/li>\n\n\n\n<li>Joustaviin piireihin valitaan polyimidi- tai FEP-tyyppej\u00e4 juottamisen ja l\u00e4mp\u00f6tilan mukaan. Kuivaa materiaalit, jos ne imev\u00e4t kosteutta.<\/li>\n\n\n\n<li>Suunnittele l\u00e4piviennit ja kerrosten rakentaminen varhaisessa vaiheessa HDI-suunnittelussa. K\u00e4yt\u00e4 rakentamismenetelmi\u00e4, kun tarvitset monia sokeita tai upotettuja l\u00e4pivientej\u00e4.<\/li>\n\n\n\n<li>Luettele piirustuksissa kriittiset kohdat valmistusta varten: lopullinen paksuus, kerrosparin ytimen paksuus, kuparin paino kerrosta kohti tarvittaessa, mitk\u00e4 kerrokset ovat signaalikerroksia ja mitk\u00e4 tasoja, ja kriittisten verkkojen tavoiteimpedanssi. Lis\u00e4\u00e4 huomautus siit\u00e4, ett\u00e4 valmistaja asettaa prepreg-levyjen sijoittelun impedanssin ja kokonaispaksuuden mukaisesti, ellei tarkkaa prepreg-levy\u00e4 tarvita ja ellei suunnittelija voi m\u00e4\u00e4ritell\u00e4 sit\u00e4 luotettavasti.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Abstract This paper explains the classification, material choice, technology trends, design rules, and processing standards for printed circuit boards (PCBs) [&hellip;]<\/p>","protected":false},"author":1,"featured_media":4686,"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 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This paper explains the classification, material choice, technology trends, design rules, and processing standards for printed circuit boards (PCBs) 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