{"id":3647,"date":"2025-07-17T18:29:10","date_gmt":"2025-07-17T10:29:10","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3647"},"modified":"2025-07-17T18:31:42","modified_gmt":"2025-07-17T10:31:42","slug":"what-is-the-most-important-aspect-of-pcb-design","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/","title":{"rendered":"Mik\u00e4 on piirilevysuunnittelun t\u00e4rkein n\u00e4k\u00f6kohta?"},"content":{"rendered":"<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-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#Key_Points_of_PCB_Design\" >PCB-suunnittelun t\u00e4rkeimm\u00e4t kohdat<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#1_PCB_Layout_Planning\" >1. PCB-asettelun suunnittelu<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#11_Functional_Partitioning_and_Isolation_Design\" >1.1 Toiminnallinen osioinnin ja erist\u00e4misen suunnittelu<\/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\/what-is-the-most-important-aspect-of-pcb-design\/#12_Mechanical_and_Thermal_Design_Standards\" >1.2 Mekaaniset ja termiset suunnittelustandardit<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#2_High-Speed_PCB_Routing_Strategies\" >2. Nopean piirilevyn reititysstrategiat<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#21_Fundamental_Routing_Principles\" >2.1 Reitityksen perusperiaatteet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#22_Special_Signal_Handling\" >2.2 Erikoissignaalien k\u00e4sittely<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#3_Power_Integrity_Design\" >3. Tehon eheyden suunnittelu<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#31_Multilayer_Board_Power_Architecture\" >3.1 Monikerroksisen piirilevyn tehoarkkitehtuuri<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#32_Voltage_Conversion_Design\" >3.2 J\u00e4nnitteen muuntamisen suunnittelu<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#4_Advanced_Signal_Integrity_Optimization\" >4. Kehittynyt signaalin eheyden optimointi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#41_Transmission_Line_Control\" >4.1 Siirtojohdon valvonta<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#42_Crosstalk_Mitigation_Techniques\" >4.2 Ristikk\u00e4isviestien lievent\u00e4mistekniikat<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#5_DFM_Design_for_Manufacturing_Standards\" >5. DFM (Design for Manufacturing) -standardit<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#51_Process_Capability_Parameters\" >5.1 Prosessikapasiteetin parametrit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#52_Special_Structure_Design\" >5.2 Erityisrakenteiden suunnittelu<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#6_Design_Verification_Process\" >6. Suunnittelun todentamisprosessi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/what-is-the-most-important-aspect-of-pcb-design\/#61_Pre-Production_Checklist\" >6.1 Tuotantoa edelt\u00e4v\u00e4 tarkistuslista<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_Points_of_PCB_Design\"><\/span>PCB-suunnittelun t\u00e4rkeimm\u00e4t kohdat<span class=\"ez-toc-section-end\"><\/span><\/h1><p><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-layout-design\/\">PCB-suunnittelu<\/a> on elektroniikkatuotteiden perusta. Piirilevyn laatu vaikuttaa suoraan siihen, kuinka hyvin laite toimii, kuinka luotettava se on ja kuinka paljon sen tuottaminen maksaa. Suunnittelussa on useita t\u00e4rkeit\u00e4 osia <a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/printed-circuit-board-pcb\/\">painetut piirilevyt<\/a> (PCB). T\u00e4h\u00e4n kuuluu asettelun suunnittelu, reititysstrategioiden p\u00e4\u00e4tt\u00e4minen ja sen varmistaminen, ett\u00e4 virta ja signaali ovat kunnossa. My\u00f6s valmistusprosessin vaatimukset ovat t\u00e4rkeit\u00e4.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-1.jpg\" alt=\"piirilevysuunnittelu\" class=\"wp-image-3650\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_PCB_Layout_Planning\"><\/span>1. PCB-asettelun suunnittelu<span class=\"ez-toc-section-end\"><\/span><\/h2><p><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-layer-selection-strategy\/\">PCB-layout<\/a> on suunnittelun ensisijainen vaihe, jossa komponenttien oikea sijoittelu optimoi signaalivirran, v\u00e4hent\u00e4\u00e4 h\u00e4iri\u00f6it\u00e4 ja parantaa l\u00e4mp\u00f6tehokkuutta.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_Functional_Partitioning_and_Isolation_Design\"><\/span>1.1 Toiminnallinen osioinnin ja erist\u00e4misen suunnittelu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Analoginen\/digitaalinen\/RF-alueen eristys<\/strong>: Saavutetaan fyysisell\u00e4 et\u00e4isyydell\u00e4 (\u22655mm) ja maatason erottelulla.<\/li>\n\n<li><strong>Suurj\u00e4nnite- ja pienj\u00e4nnitealuejako<\/strong>: Tehomuuntomoduulien et\u00e4isyys herkist\u00e4 signaaleista on s\u00e4ilytett\u00e4v\u00e4 10-15 mm.<\/li>\n\n<li><strong>L\u00e4mp\u00f6herkkien komponenttien sijoittaminen<\/strong>: BGA-kotelot vaativat 5 mm:n suojavy\u00f6hykkeen; l\u00e4mp\u00f6\u00e4 tuottavien komponenttien (esim. teho-MOSFETit) tulisi olla l\u00e4hell\u00e4 levyn reunoja.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_Mechanical_and_Thermal_Design_Standards\"><\/span>1.2 Mekaaniset ja termiset suunnittelustandardit<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Koordinaattij\u00e4rjestelm\u00e4n asennus<\/strong>: Alkukohta kulman kiinnitysreikien keskipisteess\u00e4 (\u00b10,05 mm tarkkuus).<\/li>\n\n<li><strong>L\u00e4mm\u00f6nhallinnan suunnittelu<\/strong>:<\/li>\n\n<li>Luonnollinen konvektioasettelu: Korkean l\u00e4mp\u00f6tilan komponentit piirilevyn yl\u00e4osassa<\/li>\n\n<li>Pakotettu ilmaj\u00e4\u00e4hdytys: Komponentit kohdistetaan ilmavirran suuntaan<\/li>\n\n<li><strong>Rakenteellinen yhteensopivuus<\/strong>: Liittimien on oltava linjassa kotelon aukkojen kanssa (\u00b10,2 mm:n toleranssi).<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_High-Speed_PCB_Routing_Strategies\"><\/span>2. <a href=\"https:\/\/www.topfastpcb.com\/fi\/products\/high-speed-pcb\/\">High-Speed PCB<\/a> Reititysstrategiat<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"21_Fundamental_Routing_Principles\"><\/span>2.1 Reitityksen perusperiaatteet<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>3W s\u00e4\u00e4nt\u00f6<\/strong>: J\u00e4ljen v\u00e4li \u22653\u00d7 j\u00e4ljen leveys (esim. 15mil v\u00e4li 5mil leveydelle).<\/li>\n\n<li><strong>Ortogonaalisen kerroksen reititys<\/strong>: Vierekk\u00e4iset signaalikerrokset k\u00e4ytt\u00e4v\u00e4t kohtisuoraa reitityst\u00e4 (0\u00b0\/90\u00b0 risteys).<\/li>\n\n<li><strong>Optimoinnin kautta<\/strong>: Suurnopeussignaalit, jotka vaihtavat kerrosta, vaativat vierekk\u00e4isi\u00e4 maadoitettuja paluukujia (v\u00e4li \u2264\u03bb\/10).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"22_Special_Signal_Handling\"><\/span>2.2 Erikoissignaalien k\u00e4sittely<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Signaalin tyyppi<\/th><th>Reititysvaatimukset<\/th><th>Tyypilliset parametrit<\/th><\/tr><\/thead><tbody><tr><td>Differentiaaliset parit<\/td><td>Pituuden sovittaminen (\u00b15mil)<\/td><td>100\u03a9\u00b110% impedanssi<\/td><\/tr><tr><td>Kellosignaalit<\/td><td>Vartijan j\u00e4ljet<\/td><td>6mil leveys<\/td><\/tr><tr><td>RF-signaalit<\/td><td>Kaarevat kulmat<\/td><td>50\u03a9 impedanssi<\/td><\/tr><\/tbody><\/table><\/figure><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-2.jpg\" alt=\"piirilevysuunnittelu\" class=\"wp-image-3649\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Power_Integrity_Design\"><\/span>3. Tehon eheyden suunnittelu<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"31_Multilayer_Board_Power_Architecture\"><\/span>3.1 Monikerroksisen piirilevyn tehoarkkitehtuuri<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Tason segmentointi<\/strong>:<\/li>\n\n<li>Digitaalinen (1,2V\/1,8V) ja analoginen virraneristys.<\/li>\n\n<li>20H-s\u00e4\u00e4nt\u00f6: Dielektrinen paksuus maasta 20\u00d7.<\/li>\n\n<li><strong>Decoupling-kondensaattorin sijoittaminen<\/strong>:<\/li>\n\n<li>Bulk-kondensaattorit (10\u03bcF) tehonsy\u00f6t\u00f6iss\u00e4<\/li>\n\n<li>Pienet kondensaattorit (0,1\u03bcF) l\u00e4hell\u00e4 IC-nastoja (\u22643mm).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"32_Voltage_Conversion_Design\"><\/span>3.2 J\u00e4nnitteen muuntamisen suunnittelu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>DC-DC-asettelun perusteet<\/strong>:<\/li>\n\n<li>Induktorin ja kytkimen v\u00e4linen et\u00e4isyys \u22645mm<\/li>\n\n<li>Takaisinkytkent\u00e4j\u00e4ljet ohjataan poisp\u00e4in melul\u00e4hteist\u00e4<\/li>\n\n<li><strong>Ripple Control<\/strong>:<\/li>\n\n<li>Kuorman siirtym\u00e4vaste \u0394V&lt;2%<\/li>\n\n<li>\u226540dB kohinanvaimennus @100MHz<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Advanced_Signal_Integrity_Optimization\"><\/span>4. Kehittynyt signaalin eheyden optimointi<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"41_Transmission_Line_Control\"><\/span>4.1 Siirtojohdon valvonta<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Impedanssin sovituksen laskeminen<\/strong>:<\/li><\/ul><pre class=\"wp-block-code\"><code>  Mikroliuskaimpedanssin kaava:  \n  Z0 = [87\/sqrt(\u03b5r+1.41)] * ln[5.98h\/(0.8w+t)]  <\/code><\/pre><ul class=\"wp-block-list\"><li><strong>Lopettamisstrategiat<\/strong>:<\/li>\n\n<li>L\u00e4hdesarjan terminointi (22-33\u03a9)<\/li>\n\n<li>P\u00e4\u00e4teparalleliit\u00e4nt\u00e4 (50\u03a9 maahan)<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"42_Crosstalk_Mitigation_Techniques\"><\/span>4.2 Ristikk\u00e4isviestien lievent\u00e4mistekniikat<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>3D-v\u00e4lien s\u00e4\u00e4nn\u00f6t<\/strong>:<\/li>\n\n<li>Saman kerroksen v\u00e4li \u22653H (H = korkeus vertailutasoon n\u00e4hden).<\/li>\n\n<li>Liittym\u00e4kerroksen porrastettu reititys<\/li>\n\n<li><strong>Suojausmenetelm\u00e4t<\/strong>:<\/li>\n\n<li>1 maadoitusj\u00e4lki jokaista 5 nopeaa signaalia kohti<\/li>\n\n<li>Kriittiset signaalit nauhakokoonpanossa<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-3.jpg\" alt=\"piirilevysuunnittelu\" class=\"wp-image-3648\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-3-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/pcb-degin-3-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_DFM_Design_for_Manufacturing_Standards\"><\/span>5. DFM (Design for Manufacturing) -standardit<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"51_Process_Capability_Parameters\"><\/span>5.1 Prosessikapasiteetin parametrit<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parametri<\/th><th>Standardiprosessi<\/th><th>Korkean tarkkuuden prosessi<\/th><\/tr><\/thead><tbody><tr><td>Min j\u00e4ljen leveys<\/td><td>0.1mm<\/td><td>0.05mm<\/td><\/tr><tr><td>Min porakoko<\/td><td>0.2mm<\/td><td>0.1mm<\/td><\/tr><tr><td>Tyynyn v\u00e4li<\/td><td>0.15mm<\/td><td>0.08mm<\/td><\/tr><\/tbody><\/table><\/figure><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"52_Special_Structure_Design\"><\/span>5.2 Erityisrakenteiden suunnittelu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Thermal Via Arrays<\/strong>: 0,3 mm halkaisija, 0,6 mm jako<\/li>\n\n<li><strong>Kuparin tasapainottaminen<\/strong>: &lt;30% kuparin pinta-alaero per puoli<\/li>\n\n<li><strong>Panelointi suunnittelu<\/strong>: V-leikkauslinjat, joilla v\u00e4ltet\u00e4\u00e4n tihe\u00e4t reititysalueet.<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Design_Verification_Process\"><\/span>6. Suunnittelun todentamisprosessi<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"61_Pre-Production_Checklist\"><\/span>6.1 Tuotantoa edelt\u00e4v\u00e4 tarkistuslista<span class=\"ez-toc-section-end\"><\/span><\/h3><ol class=\"wp-block-list\"><li>S\u00e4hk\u00f6inen s\u00e4\u00e4nt\u00f6tarkastus (ERC): Auki\/lyhyt-tarkastus<\/li>\n\n<li>Suunnittelus\u00e4\u00e4nt\u00f6jen tarkistus (DRC): 300+ prosessis\u00e4\u00e4nt\u00f6\u00e4<\/li>\n\n<li>Signaalin eheyden simulointi: &gt;15%.<\/li>\n\n<li>L\u00e4mp\u00f6analyysi: &lt;80%-luokitus.<\/li><\/ol><p><\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00e4ss\u00e4 artikkelissa tarkastellaan piirilevysuunnittelun keskeisi\u00e4 periaatteita perusasettelusta nopeaan signaalink\u00e4sittelyyn, ja siin\u00e4 selitet\u00e4\u00e4n yksityiskohtaisesti virran eheyden ratkaisuja, s\u00e4hk\u00f6magneettisten h\u00e4iri\u00f6iden (EMI) estoa ja valmistettavuusstandardeja, mukaan lukien impedanssilaskelmat, l\u00e4mm\u00f6nhallinta ja todentamisen ty\u00f6nkulut.<\/p>","protected":false},"author":1,"featured_media":3651,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[110],"class_list":["post-3647","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-pcb-design"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is the most important aspect of PCB design? - Topfastpcb<\/title>\n<meta name=\"description\" content=\"The following core PCB design technologies are covered: high-speed routing, power integrity, EMC design and DFM specifications. 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