{"id":2334,"date":"2025-05-05T18:01:35","date_gmt":"2025-05-05T09:31:35","guid":{"rendered":"http:\/\/topfastpcbb.ru\/?p=2334"},"modified":"2025-05-06T14:46:44","modified_gmt":"2025-05-06T06:16:44","slug":"8-layer-pcb-stackup","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/8-layer-pcb-stackup\/","title":{"rendered":"8-kerroksinen PCB Stackup"},"content":{"rendered":"<p>8-kerroksinen PCB-laminaattirakenne sis\u00e4lt\u00e4\u00e4 yleens\u00e4 signaalikerroksen, tehokerroksen ja maadoituskerroksen, erityisj\u00e4rjestelyt ja suunnitteluperiaatteet ovat seuraavat<\/p><p>Signaalikerros:Signaalikerros: Se sis\u00e4lt\u00e4\u00e4 yleens\u00e4 ylimm\u00e4n kerroksen (TOP), alimman kerroksen (Bottom) ja keskell\u00e4 olevan signaalikerroksen (esim. Signal2, Signal3 jne.).Signaalikerrosta k\u00e4ytet\u00e4\u00e4n p\u00e4\u00e4asiassa s\u00e4hk\u00f6isten signaalien johdottamiseen ja l\u00e4hett\u00e4miseen.<\/p><p>Tehokerros:Power1, Power2 jne.), joita k\u00e4ytet\u00e4\u00e4n vakaan virransy\u00f6t\u00f6n tarjoamiseen. Tehonsy\u00f6tt\u00f6kerros on maakerroksen vieress\u00e4, jotta tehonsy\u00f6t\u00f6n ja maan v\u00e4linen kytkent\u00e4 toteutuisi paremmin ja jotta tehotasojen ja maatason v\u00e4linen impedanssi pienenisi.<\/p><p>Maakerros: sis\u00e4lt\u00e4\u00e4 yhden tai useamman maakerroksen (esim. Ground1, Ground2 jne.), joita k\u00e4ytet\u00e4\u00e4n p\u00e4\u00e4asiassa vakaan maatason muodostamiseen ja s\u00e4hk\u00f6magneettisten h\u00e4iri\u00f6iden v\u00e4hent\u00e4miseen. Maataso on virtatason vieress\u00e4 signaalin eheyden parantamiseksi.<\/p><h2><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-design-principles\/\">Suunnitteluperiaatteet<\/a> ja yhteiset j\u00e4rjestelyt<\/h2><p>P\u00e4\u00e4piirin vieress\u00e4 oleva kerros on maataso: se muodostaa vakaan vertailutason p\u00e4\u00e4piirille ja v\u00e4hent\u00e4\u00e4 h\u00e4iri\u00f6it\u00e4.<br>Kaikki signaalikerrokset ovat mahdollisimman l\u00e4hell\u00e4 maatasoa: t\u00e4m\u00e4 parantaa signaalin eheytt\u00e4.<br>V\u00e4lt\u00e4 kahta suoraan vierekk\u00e4ist\u00e4 signaalikerrosta niin paljon kuin mahdollista: v\u00e4henn\u00e4 signaalih\u00e4iri\u00f6it\u00e4.<br>P\u00e4\u00e4virtal\u00e4hde on mahdollisimman l\u00e4hell\u00e4 vastaavaa maatasoa, jotta tehotason ja maatason v\u00e4list\u00e4 impedanssia voidaan pienent\u00e4\u00e4.<br>Symmetrinen rakenne: Dielektrisen kerroksen paksuuden ja tyypin, kuparifolion paksuuden ja graafisen jakauman tyypin tulisi olla symmetrisi\u00e4 ep\u00e4symmetrian vaikutuksen minimoimiseksi.<br><\/p><h2>Yleiset suunnitteluesimerkit ja ty\u00f6kalujen k\u00e4ytt\u00f6<\/h2><p>Yleinen pinottu kerrosrakenne: kuten TOP-Gnd-Signal-Power-Gnd-Gnd-Signal-Gnd-Bottom jne.T\u00e4m\u00e4 rakenne voi tarjota paremman signaalin eheyden ja s\u00e4hk\u00f6magneettisen yhteensopivuuden.<br>Huaqiu DFM -ty\u00f6kalun k\u00e4ytt\u00f6: T\u00e4m\u00e4 ty\u00f6kalu auttaa laskemaan impedanssin, valitsemaan oikean linjan leveyden ja v\u00e4lin ja varmistamaan suunnittelun tarkkuuden.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"591\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/05\/8-Layer-PCB-1.jpg\" alt=\"\" class=\"wp-image-2363\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/05\/8-Layer-PCB-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/05\/8-Layer-PCB-1-300x296.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/05\/8-Layer-PCB-1-100x100.jpg 100w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Sis\u00e4llysluettelo<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/8-layer-pcb-stackup\/#8-Layer_PCB_Stackup_Design_Analysis\" >8-kerroksinen PCB Stackup Design Analysis<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/8-layer-pcb-stackup\/#Option_1_Six_Signal_Layer_Design_Not_Recommended\" >Vaihtoehto 1: kuuden signaalikerroksen rakenne (ei suositella)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/8-layer-pcb-stackup\/#Option_2_Four_Signal_Layer_Design_Recommended\" >Vaihtoehto 2: Nelj\u00e4n signaalikerroksen rakenne (suositeltava)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/8-layer-pcb-stackup\/#Option_3_Optimal_Four_Signal_Layer_Design_Highly_Recommended\" >Vaihtoehto 3: Optimaalinen nelj\u00e4n signaalikerroksen rakenne (eritt\u00e4in suositeltava)<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"8-Layer_PCB_Stackup_Design_Analysis\"><\/span>8-kerroksinen PCB Stackup Design Analysis<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Option_1_Six_Signal_Layer_Design_Not_Recommended\"><\/span>Vaihtoehto 1: kuuden signaalikerroksen rakenne (ei suositella)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Rakenteen ominaisuudet<\/strong>:<\/p><ol class=\"wp-block-list\"><li><strong>Ylin kerros<\/strong>: Signaali 1 (komponenttipuoli \/ mikroliuska reitityskerros)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Signaali 2 (X-suuntainen mikroliuska, korkealaatuinen reitityskerros).<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Maa (maataso)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Signaali 3 (Y-suuntainen liuskajohto, korkealaatuinen reitityskerros)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Signaali 4 (nauhalinjan reitityskerros)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Teho (Tehotasot)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>: Signaali 5 (mikroliuska reitityskerros)<\/li>\n\n<li><strong>Pohjakerros<\/strong>: Signaali 6 (mikroliuska reitityskerros)<\/li><\/ol><p><strong>Haitta-analyysi<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Heikko s\u00e4hk\u00f6magneettinen absorptio<\/li>\n\n<li>Korkea tehoimpedanssi<\/li>\n\n<li>Puutteelliset signaalin paluureitit<\/li>\n\n<li>Heikompi EMI-suorituskyky<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Option_2_Four_Signal_Layer_Design_Recommended\"><\/span>Vaihtoehto 2: Nelj\u00e4n signaalikerroksen rakenne (suositeltava)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Parannetut ominaisuudet<\/strong>:<\/p><ol class=\"wp-block-list\"><li><strong>Ylin kerros<\/strong>Signaali 1 (Komponenttipuoli\/Microstrip, ensiluokkainen reitityskerros)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Maa (matalaimpedanssinen maataso, erinomainen EM-absorptio)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Signaali 2 (liuskajohto, korkealuokkainen reitityskerros)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Teho (tehotaso muodostaa kapasitiivisen kytkenn\u00e4n viereisen maan kanssa).<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Maa (maataso)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Signaali 3 (liuskajohto, korkealuokkainen reitityskerros)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Teho (Tehotasot)<\/li>\n\n<li><strong>Pohjakerros<\/strong>: Signaali 4 (mikroliuska, korkealaatuinen reitityskerros)<\/li><\/ol><p><strong>Edut<\/strong>:<br>\u2713 Omistettu vertailutaso jokaiselle signaalikerrokselle<br>\u2713 Tarkka impedanssin s\u00e4\u00e4t\u00f6 (\u00b110%)<br>\u2713 V\u00e4hennetty ristikk\u00e4is\u00e4\u00e4ni (ortogonaalinen reititys vierekk\u00e4isten kerrosten v\u00e4lill\u00e4)<br>\u2713 40 prosentin parannus tehon eheydess\u00e4<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Option_3_Optimal_Four_Signal_Layer_Design_Highly_Recommended\"><\/span>Vaihtoehto 3: Optimaalinen nelj\u00e4n signaalikerroksen rakenne (eritt\u00e4in suositeltava)<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Kultaisen s\u00e4\u00e4nn\u00f6n rakenne<\/strong>:<\/p><ol class=\"wp-block-list\"><li><strong>Ylin kerros<\/strong>Signaali 1 (Komponenttipuoli\/Microstrip)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Maa (kiinte\u00e4 maataso)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Signaali 2 (nauhalinja)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Teho (Tehotasot)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Maadoitus (Ydinmaataso)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Signaali 3 (nauhalinja)<\/li>\n\n<li><strong>Sis\u00e4kerros<\/strong>Maadoitus (suojaava maataso)<\/li>\n\n<li><strong>Pohjakerros<\/strong>: Signaali 4 (mikroliuska)<\/li><\/ol><p><strong>Erinomainen suoritus<\/strong>:<br>\u2605 Viisi maatasoa tarjoavat t\u00e4ydellisen EM-suojauksen<br>\u2605 &lt; 3 milin teho-maav\u00e4li optimaalista irrotusta varten<br>\u2605 Symmetrinen kerrosjakauma est\u00e4\u00e4 v\u00e4\u00e4ntymisen<br>\u2605 Tukee 20 Gbps nopeaa signalointia<\/p><p><strong>Suunnittelusuositukset<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Reitit\u00e4 kriittiset signaalit ensin S2\/S3-nauhalankakerroksilla.<\/li>\n\n<li>Toteuta jaetun tehotason suunnittelu<\/li>\n\n<li>Rajoita ylimm\u00e4n\/alimmaisen kerroksen j\u00e4ljet &lt;5 mm:n pituisiin.<\/li>\n\n<li>S\u00e4ilytet\u00e4\u00e4n ortogonaalinen reititys vierekk\u00e4isten signaalikerrosten v\u00e4lill\u00e4.<\/li><\/ol><h2><strong>Pinoamispaksuuden viite<\/strong><\/h2><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Kerros<\/th><th>Materiaali<\/th><th>Paksuus (mil)<\/th><\/tr><\/thead><tbody><tr><td>1-2<\/td><td>FR4<\/td><td>3.2<\/td><\/tr><tr><td>2-3<\/td><td>1080PP<\/td><td>4.5<\/td><\/tr><tr><td>4-5<\/td><td>Ydin<\/td><td>8.0<\/td><\/tr><tr><td>6-7<\/td><td>2116PP<\/td><td>5.2<\/td><\/tr><tr><td>7-8<\/td><td>FR4<\/td><td>3.2<\/td><\/tr><\/tbody><\/table><\/figure><p>Huomautus: Kaikissa suunnitelmissa on oltava sokeat \/ haudatut l\u00e4piviennit optimaalisen reititystilan hy\u00f6dynt\u00e4miseksi.<\/p>","protected":false},"excerpt":{"rendered":"<p>8-kerroksinen piirilevypino koostuu yleens\u00e4 signaali-, teho- ja maadoituskerroksista.<\/p>","protected":false},"author":1,"featured_media":2364,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[112],"tags":[216,215],"class_list":["post-2334","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-8-layer-pcb","tag-8-layer-pcb-stackup"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>8-Layer PCB Stackup - Topfastpcb<\/title>\n<meta name=\"description\" content=\"An 8-layer PCB stack typically consists of signal, power, and ground layers.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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