{"id":5441,"date":"2026-04-19T08:01:00","date_gmt":"2026-04-19T00:01:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5441"},"modified":"2026-04-17T10:46:09","modified_gmt":"2026-04-17T02:46:09","slug":"common-pcb-dfm-violations-and-fixes","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/","title":{"rendered":"Yleiset PCB DFM -rikkomukset ja niiden korjaaminen"},"content":{"rendered":"<p>PCB Design for Manufacturing (DFM) varmistaa, ett\u00e4 piirilevysuunnittelu voidaan tuottaa luotettavasti k\u00e4ytt\u00e4m\u00e4ll\u00e4 tavanomaisia valmistusprosesseja.<\/p><p>Monet piirilevymallit sis\u00e4lt\u00e4v\u00e4t kuitenkin DFM-virheit\u00e4, joita ei v\u00e4ltt\u00e4m\u00e4tt\u00e4 havaita ennen valmistuksen alkamista. N\u00e4m\u00e4 ongelmat voivat johtaa:<\/p><ul class=\"wp-block-list\"><li>alhainen tuotantotulos<\/li>\n\n<li>lis\u00e4\u00e4ntyneet kustannukset<\/li>\n\n<li>toimitusviiveet<\/li>\n\n<li>pitk\u00e4n aikav\u00e4lin luotettavuush\u00e4iri\u00f6t<\/li><\/ul><p>Yleisten PCB DFM -rikkomusten ymm\u00e4rt\u00e4minen ja niiden korjaaminen auttaa insin\u00f6\u00f6rej\u00e4 luomaan malleja, jotka ovat sek\u00e4 toimivia ett\u00e4 valmistettavia.<\/p><p>DFM:n periaatteiden t\u00e4ydellinen esittely on selitetty asiakirjassa: <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/complete-guide-to-pcb-design-for-manufacturability-dfm\/\">PCB Design for Manufacturing (DFM) -ohjeet<\/a><\/strong><\/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\/11\/DFM-2.jpg\" alt=\"DFM\" class=\"wp-image-4701\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/11\/DFM-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/11\/DFM-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/11\/DFM-2-18x12.jpg 18w\" 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\/common-pcb-dfm-violations-and-fixes\/#1_Trace_Width_and_Spacing_Violations\" >1. J\u00e4ljen leveyden ja v\u00e4lien rikkominen<\/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\/common-pcb-dfm-violations-and-fixes\/#Problem\" >Ongelma<\/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\/common-pcb-dfm-violations-and-fixes\/#Impact\" >Vaikutus<\/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\/common-pcb-dfm-violations-and-fixes\/#Solution\" >Ratkaisu<\/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\/common-pcb-dfm-violations-and-fixes\/#2_Via_Design_Errors\" >2. Suunnitteluvirheiden kautta<\/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\/common-pcb-dfm-violations-and-fixes\/#Problem-2\" >Ongelma<\/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\/common-pcb-dfm-violations-and-fixes\/#Impact-2\" >Vaikutus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Solution-2\" >Ratkaisu<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#3_Solder_Mask_Design_Issues\" >3. Juotosmaskin suunnitteluun liittyv\u00e4t kysymykset<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Problem-3\" >Ongelma<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Impact-3\" >Vaikutus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Solution-3\" >Ratkaisu<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#4_Component_Placement_Problems\" >4. Komponenttien sijoitteluun liittyv\u00e4t ongelmat<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Problem-4\" >Ongelma<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Impact-4\" >Vaikutus<\/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\/common-pcb-dfm-violations-and-fixes\/#Solution-4\" >Ratkaisu<\/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\/common-pcb-dfm-violations-and-fixes\/#5_Panelization_Design_Mistakes\" >5. Paneloinnin suunnitteluvirheet<\/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\/common-pcb-dfm-violations-and-fixes\/#Problem-5\" >Ongelma<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Impact-5\" >Vaikutus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Solution-5\" >Ratkaisu<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#6_Drill_and_Hole_Tolerance_Issues\" >6. Porauksen ja rei\u00e4n toleranssikysymykset<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Problem-6\" >Ongelma<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Impact-6\" >Vaikutus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Solution-6\" >Ratkaisu<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#7_Copper_Imbalance_and_Warpage\" >7. Kuparin ep\u00e4tasapaino ja v\u00e4\u00e4ntyminen<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Problem-7\" >Ongelma<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Impact-7\" >Vaikutus<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Solution-7\" >Ratkaisu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#How_to_Prevent_PCB_DFM_Violations\" >Miten est\u00e4\u00e4 PCB DFM -rikkomukset<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#Conclusion\" >P\u00e4\u00e4telm\u00e4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/common-pcb-dfm-violations-and-fixes\/#FAQ\" >FAQ<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Trace_Width_and_Spacing_Violations\"><\/span>1. J\u00e4ljen leveyden ja v\u00e4lien rikkominen<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem\"><\/span>Ongelma<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Suunnitelmissa on usein j\u00e4lki\u00e4 tai v\u00e4lej\u00e4, jotka alittavat valmistusrajat.<\/p><p>Tyypillisi\u00e4 ongelmia:<\/p><ul class=\"wp-block-list\"><li>liian kapeat j\u00e4ljet<\/li>\n\n<li>liian tiukka v\u00e4li<\/li>\n\n<li>ep\u00e4johdonmukainen reititystiheys<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact\"><\/span>Vaikutus<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>oikosulut<\/li>\n\n<li>signaalin eheyteen liittyv\u00e4t ongelmat<\/li>\n\n<li>sy\u00f6vytysvirheet<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution\"><\/span>Ratkaisu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>noudattaa valmistajan suunnittelus\u00e4\u00e4nt\u00f6j\u00e4 (esim. \u2265 4 milin j\u00e4lki\/tilav\u00e4li).<\/li>\n\n<li>yll\u00e4pit\u00e4\u00e4 johdonmukaisia reititysleveyksi\u00e4<\/li>\n\n<li>Sovelletaan DRC-s\u00e4\u00e4nt\u00f6j\u00e4 suunnittelun alkuvaiheessa<\/li><\/ul><p>J\u00e4lkien suunnittelun perusteita k\u00e4sitell\u00e4\u00e4n seuraavassa: <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-trace-width-current-capacity-guide\/\">PCB Trace Width ja Spacing suunnittelus\u00e4\u00e4nn\u00f6t<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Via_Design_Errors\"><\/span>2. Suunnitteluvirheiden kautta<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem-2\"><\/span>Ongelma<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Virheellinen via-suunnittelu on yksi yleisimmist\u00e4 DFM-rikkomuksista.<\/p><p>Esimerkkej\u00e4:<\/p><ul class=\"wp-block-list\"><li>suuren kuvasuhteen l\u00e4piviennit<\/li>\n\n<li>Pienet porakoot eiv\u00e4t riit\u00e4<\/li>\n\n<li>riitt\u00e4m\u00e4t\u00f6n rengasrengas<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact-2\"><\/span>Vaikutus<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>huono pinnoituksen laatu<\/li>\n\n<li>avoimet piirit<\/li>\n\n<li>v\u00e4hentynyt luotettavuus<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution-2\"><\/span>Ratkaisu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>s\u00e4ilytt\u00e4\u00e4 kuvasuhde \u2264 10:1<\/li>\n\n<li>varmistetaan riitt\u00e4v\u00e4 rengasrengas<\/li>\n\n<li>K\u00e4yt\u00e4 vakioporakokoja<\/li><\/ul><p>Yksityiskohtaiset via-suunnittelus\u00e4\u00e4nn\u00f6t on selitetty asiakirjassa: <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-via-design-rules-for-reliable-manufacturing\/\">PCB Via suunnittelus\u00e4\u00e4nn\u00f6t luotettavaa valmistusta varten<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Solder_Mask_Design_Issues\"><\/span>3. Juotosmaskin suunnitteluun liittyv\u00e4t kysymykset<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem-3\"><\/span>Ongelma<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Virheelliset juotosmaskin m\u00e4\u00e4ritelm\u00e4t voivat vaikuttaa kokoonpanon laatuun.<\/p><p>Yleiset ongelmat:<\/p><ul class=\"wp-block-list\"><li>maskin aukot liian pienet<\/li>\n\n<li>riitt\u00e4m\u00e4t\u00f6n juotosmaskin pato<\/li>\n\n<li>maskin ja tyynyjen v\u00e4linen virheellinen linjaus.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact-3\"><\/span>Vaikutus<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>juotos silloitus<\/li>\n\n<li>huonot juotosliitokset<\/li>\n\n<li>altistunut kupari<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution-3\"><\/span>Ratkaisu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>K\u00e4yt\u00e4 asianmukaista maskin laajennusta (2-4 mil)<\/li>\n\n<li>padon leveyden s\u00e4ilytt\u00e4minen \u2265 4 mil<\/li>\n\n<li>validoi maskin kohdistustoleranssi<\/li><\/ul><p>Lis\u00e4tietoja on saatavilla osoitteessa: <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-solder-mask-design-guidelines\/\">PCB-juotosmaskin suunnitteluohjeet<\/a><\/strong><\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"337\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Basics-2.jpg\" alt=\"PCB DFM perusteet\" class=\"wp-image-5156\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Basics-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Basics-2-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Basics-2-18x10.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Component_Placement_Problems\"><\/span>4. Komponenttien sijoitteluun liittyv\u00e4t ongelmat<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem-4\"><\/span>Ongelma<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Huono komponenttien sijoittelu voi v\u00e4hent\u00e4\u00e4 kokoonpanon tehokkuutta.<\/p><p>Esimerkkej\u00e4:<\/p><ul class=\"wp-block-list\"><li>komponentit liian l\u00e4hell\u00e4 toisiaan<\/li>\n\n<li>ep\u00e4johdonmukainen suuntautuminen<\/li>\n\n<li>riitt\u00e4m\u00e4tt\u00f6m\u00e4t v\u00e4lit uudelleenty\u00f6st\u00f6\u00e4 varten<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact-4\"><\/span>Vaikutus<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>sijoitusvirheet<\/li>\n\n<li>reflow-virheet<\/li>\n\n<li>vaikea tarkastus<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution-4\"><\/span>Ratkaisu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Noudata sijoitusv\u00e4li\u00e4 koskevia ohjeita<\/li>\n\n<li>yhdenmukaistaa komponenttien suuntausta<\/li>\n\n<li>ottaa huomioon kokoonpanoprosessin rajoitukset<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Panelization_Design_Mistakes\"><\/span>5. Paneloinnin suunnitteluvirheet<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem-5\"><\/span>Ongelma<span class=\"ez-toc-section-end\"><\/span><\/h3><p>V\u00e4\u00e4r\u00e4nlainen paneelien suunnittelu voi aiheuttaa k\u00e4sittely- ja erottumisongelmia.<\/p><p>Esimerkkej\u00e4:<\/p><ul class=\"wp-block-list\"><li>puuttuvat kiskot<\/li>\n\n<li>heikot irrotettavat kielekkeet<\/li>\n\n<li>V\u00e4\u00e4r\u00e4t et\u00e4isyydet levyjen v\u00e4lill\u00e4<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact-5\"><\/span>Vaikutus<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>levyn vaurioituminen irrotuksen aikana<\/li>\n\n<li>kokoonpanovirhe<\/li>\n\n<li>alentunut tuotto<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution-5\"><\/span>Ratkaisu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Lis\u00e4\u00e4 asianmukaiset paneelikiskot<\/li>\n\n<li>pit\u00e4\u00e4 yll\u00e4 v\u00e4li\u00e4 (2-3 mm reitityst\u00e4 varten)<\/li>\n\n<li>Valitse oikea irrotusmenetelm\u00e4<\/li><\/ul><p>Paneelin suunnittelun yksityiskohdat on selitetty asiakirjassa: <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-panelization-design-guidelines\/\">PCB Panelization suunnitteluohjeet<\/a><\/strong><\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Drill_and_Hole_Tolerance_Issues\"><\/span>6. Porauksen ja rei\u00e4n toleranssikysymykset<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem-6\"><\/span>Ongelma<span class=\"ez-toc-section-end\"><\/span><\/h3><p>V\u00e4\u00e4r\u00e4t reik\u00e4koot tai toleranssit voivat vaikuttaa kokoonpanoon.<\/p><p>Esimerkkej\u00e4:<\/p><ul class=\"wp-block-list\"><li>rei\u00e4n koko on liian pieni<\/li>\n\n<li>Virheelliset pinnoitusvaatimukset<\/li>\n\n<li>ep\u00e4suhta komponenttien johtojen kanssa<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact-6\"><\/span>Vaikutus<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>komponenttien huono istuvuus<\/li>\n\n<li>mekaaninen rasitus<\/li>\n\n<li>kokoonpanovirheet<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution-6\"><\/span>Ratkaisu<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>m\u00e4\u00e4rit\u00e4 oikea valmiin rei\u00e4n koko<\/li>\n\n<li>ottaa huomioon pinnoituksen paksuus<\/li>\n\n<li>sovittaa yhteen komponenttien eritelmien kanssa<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Copper_Imbalance_and_Warpage\"><\/span>7. Kuparin ep\u00e4tasapaino ja v\u00e4\u00e4ntyminen<span class=\"ez-toc-section-end\"><\/span><\/h2><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Problem-7\"><\/span>Ongelma<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Kuparin ep\u00e4tasainen jakautuminen kerroksittain.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Impact-7\"><\/span>Vaikutus<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li>PCB:n v\u00e4\u00e4ntyminen<\/li>\n\n<li>kokoonpanoasiat<\/li>\n\n<li>luotettavuusriskit<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution-7\"><\/span>Ratkaisu<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\"><li>kuparin tasapainottaminen kerroksittain<\/li>\n\n<li>k\u00e4yt\u00e4 tarvittaessa kuparivarkautta<\/li>\n\n<li>s\u00e4ilytt\u00e4\u00e4 symmetrinen pinoaminen<\/li><\/ul><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"337\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Checklist-2.jpg\" alt=\"PCB DFM tarkistuslista\" class=\"wp-image-5164\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Checklist-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Checklist-2-300x169.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/03\/PCB-DFM-Checklist-2-18x10.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Prevent_PCB_DFM_Violations\"><\/span>Miten est\u00e4\u00e4 PCB DFM -rikkomukset<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-how-to wp-block-yoast-how-to-block\"><p class=\"schema-how-to-description\">Insin\u00f6\u00f6rit voivat v\u00e4hent\u00e4\u00e4 DFM-ongelmia noudattamalla j\u00e4sennelty\u00e4 ty\u00f6nkulkua.<\/p> <ol class=\"schema-how-to-steps\"><li class=\"schema-how-to-step\" id=\"how-to-step-1776393625715\"><strong class=\"schema-how-to-step-name\">Vaihe 1 - Sovella suunnittelus\u00e4\u00e4nt\u00f6j\u00e4 varhaisessa vaiheessa<\/strong> <p class=\"schema-how-to-step-text\">Aseta j\u00e4lki-, via- ja v\u00e4liviivoituss\u00e4\u00e4nn\u00f6t asettelun alussa.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776393644653\"><strong class=\"schema-how-to-step-name\">Vaihe 2 - Suorita DRC-tarkastukset<\/strong> <p class=\"schema-how-to-step-text\">CAD-ty\u00f6kalujen suunnittelurajoitusten noudattamisen varmistaminen.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776393650043\"><strong class=\"schema-how-to-step-name\">Vaihe 3 - Suorita DFM-analyysi<\/strong> <p class=\"schema-how-to-step-text\">DFM-tarkastuksissa todennetaan valmistettavuus muutenkin kuin suunnittelun peruss\u00e4\u00e4nt\u00f6jen avulla.<br\/>Tarkistuslistan viite: <strong><a href=\"https:\/\/www.topfastpcb.com\/fi\/blog\/pcb-dfm-checklist-before-sending-gerber-files\/\">PCB DFM tarkistuslista ennen Gerber-tiedostojen l\u00e4hett\u00e4mist\u00e4<\/a><\/strong><\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776393701991\"><strong class=\"schema-how-to-step-name\">Vaihe 4 - Tee yhteisty\u00f6t\u00e4 valmistajien kanssa<\/strong> <p class=\"schema-how-to-step-text\">Valmistajat tarkastelevat malleja ja ehdottavat optimointeja.<br\/>PCB-valmistajilla, kuten <strong>TOPFAST<\/strong>, suunnittelutiimit suorittavat tyypillisesti CAM-pohjaisen DFM-analyysin ennen tuotantoa mahdollisten ongelmien tunnistamiseksi varhaisessa vaiheessa.<\/p> <\/li><\/ol><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>P\u00e4\u00e4telm\u00e4<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Piirilevyjen DFM-rikkomukset ovat merkitt\u00e4v\u00e4 valmistusongelmien l\u00e4hde, mutta useimmat niist\u00e4 voidaan v\u00e4ltt\u00e4\u00e4 asianmukaisilla suunnitteluk\u00e4yt\u00e4nn\u00f6ill\u00e4.<\/p><p>Ymm\u00e4rt\u00e4m\u00e4ll\u00e4 yleisi\u00e4 ongelmia - kuten j\u00e4ljitysv\u00e4li\u00e4, l\u00e4pivientisuunnittelua, juotosmaskia ja panelointia - insin\u00f6\u00f6rit voivat merkitt\u00e4v\u00e4sti parantaa valmistettavuutta ja tuotannon tehokkuutta.<\/p><p>Varhainen DFM-validointi ja yhteisty\u00f6 piirilevyvalmistajien kanssa ovat avainasemassa luotettavan ja kustannustehokkaan piirilevytuotannon saavuttamisessa.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1776393763119\"><strong class=\"schema-faq-question\">Mik\u00e4 on PCB DFM -rikkomus?<\/strong> <p class=\"schema-faq-answer\">Piirilevyn DFM-rikkomus tapahtuu, kun suunnittelu ei t\u00e4yt\u00e4 valmistusvalmiuksia, mik\u00e4 voi aiheuttaa tuotantovirheit\u00e4 tai vikoja.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1776393773007\"><strong class=\"schema-faq-question\">Mik\u00e4 on yleisin DFM-ongelma PCB-suunnittelussa?<\/strong> <p class=\"schema-faq-answer\">Yleisimpi\u00e4 ongelmia ovat j\u00e4ljen leveyden\/v\u00e4lin rikkominen ja via-suunnitteluvirheet.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1776393782855\"><strong class=\"schema-faq-question\">Voivatko DFM-rikkomukset lis\u00e4t\u00e4 PCB-kustannuksia?<\/strong> <p class=\"schema-faq-answer\">Kyll\u00e4. DFM-ongelmat v\u00e4hent\u00e4v\u00e4t usein tuotosta, vaativat uudelleensuunnittelua ja lis\u00e4\u00e4v\u00e4t valmistuksen monimutkaisuutta.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1776393793403\"><strong class=\"schema-faq-question\">Milloin DFM-tarkastukset olisi teht\u00e4v\u00e4?<\/strong> <p class=\"schema-faq-answer\">DFM-tarkistukset olisi suoritettava asettelun aikana ja ennen Gerber-tiedostojen julkaisemista.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>PCB Design for Manufacturing (DFM) violations are one of the main causes of production delays, low yield, and reliability failures. This guide outlines the most common PCB DFM issues, including trace width violations, via design errors, solder mask problems, and panelization mistakes. Each section explains the root cause of the issue and provides practical solutions aligned with real PCB fabrication capabilities. By identifying and correcting DFM violations early, engineers can improve manufacturability, reduce cost, and ensure stable production performance.<\/p>","protected":false},"author":1,"featured_media":4710,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[443],"class_list":["post-5441","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-dfm"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Common PCB DFM Violations and How to Fix Them (Complete Guide)<\/title>\n<meta name=\"description\" content=\"Discover the most common PCB DFM violations and how to fix them, including trace width issues, via design errors, solder mask problems, and panelization mistakes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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is a PCB DFM violation?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A PCB DFM violation occurs when a design does not meet manufacturing capabilities, potentially causing production defects or failures.\",\"inLanguage\":\"fi\"},\"inLanguage\":\"fi\"},{\"@type\":\"Question\",\"@id\":\"https:\/\/www.topfastpcb.com\/blog\/common-pcb-dfm-violations-and-fixes\/#faq-question-1776393773007\",\"position\":2,\"url\":\"https:\/\/www.topfastpcb.com\/blog\/common-pcb-dfm-violations-and-fixes\/#faq-question-1776393773007\",\"name\":\"What is the most common DFM issue in PCB design?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Trace width\/spacing violations and via design errors are among the most common 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