{"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>Piirilevyjen valmistussuunnittelun (DFM) rikkomukset ovat yksi t\u00e4rkeimmist\u00e4 syist\u00e4 tuotannon viiv\u00e4stymisiin, alhaisiin tuottoihin ja luotettavuush\u00e4iri\u00f6ihin. T\u00e4ss\u00e4 oppaassa esitell\u00e4\u00e4n tavallisimmat PCB:n DFM-ongelmat, mukaan lukien raideleveysrikkomukset, l\u00e4pivientien suunnitteluvirheet, juotosmaskiongelmat ja panelointivirheet. Jokaisessa osiossa selitet\u00e4\u00e4n ongelman perimm\u00e4inen syy ja tarjotaan k\u00e4yt\u00e4nn\u00f6n ratkaisuja, jotka on sovitettu yhteen todellisten piirilevyjen valmistusvalmiuksien kanssa. Tunnistamalla ja korjaamalla DFM-rikkomukset varhaisessa vaiheessa insin\u00f6\u00f6rit voivat parantaa valmistettavuutta, alentaa kustannuksia ja varmistaa vakaan tuotannon suorituskyvyn.<\/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, 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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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