{"id":6047,"date":"2026-08-07T09:00:00","date_gmt":"2026-08-07T01:00:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=6047"},"modified":"2026-08-04T22:42:54","modified_gmt":"2026-08-04T14:42:54","slug":"navigating-rigid-flex-pcb-design-rules","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/","title":{"rendered":"S\u00e5dan navigerer man i designreglerne for stive-fleksible printkort for at opn\u00e5 maksimal mekanisk p\u00e5lidelighed"},"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\">Indholdsfortegnelse<\/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\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#The_Intersection_of_Electronics_and_Mechanics\" >Krydsfeltet mellem elektronik og mekanik<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#Understanding_the_Rigid-Flex_Architecture_and_Materials\" >Forst\u00e5else af Rigid-Flex-arkitekturen og materialerne<\/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\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#The_Core_Materials\" >De vigtigste materialer<\/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\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#The_Critical_Transition_Zone\" >Den kritiske overgangszone<\/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\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#Dynamic_vs_Static_Flexing\" >Dynamisk kontra statisk b\u00f8jning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#How_to_Design_for_Rigid-Flex_Critical_Design_Rules\" >S\u00e5dan udformes konstruktioner til stiv-fleksible kredsl\u00f8b (kritiske designregler)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#Advanced_Considerations_High-Speed_and_HDI\" >Avancerede overvejelser: H\u00f8jhastighed og HDI<\/a><\/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\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#Frequently_Asked_Questions_FAQ\" >Ofte stillede sp\u00f8rgsm\u00e5l (FAQ)<\/a><\/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\/da\/blog\/navigating-rigid-flex-pcb-design-rules\/#Conclusion\" >Konklusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"The_Intersection_of_Electronics_and_Mechanics\"><\/span>Krydsfeltet mellem elektronik og mekanik<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Traditionelle stive printkort er statiske; n\u00e5r de f\u00f8rst er monteret, bev\u00e6ger de sig ikke. Men hvad sker der, n\u00e5r din elektronik skal foldes sammen til et lille b\u00e6rbart medicinsk udstyr, dreje sig inde i en robotarm eller modst\u00e5 de konstante vibrationer fra en rumfartsmotor? S\u00e5 v\u00e6lger du Rigid-Flex-teknologien.<\/p>\n<p>Rigid-Flex-printkort kombinerer stabiliteten fra standard FR4 med den dynamiske alsidighed, som man finder i fleksible kredsl\u00f8b af polyimid (PI). Det er dog kendt, at det er s\u00e6rdeles vanskeligt at designe dem, fordi man ikke l\u00e6ngere blot er elektroingeni\u00f8r \u2013 man er nu ogs\u00e5 maskiningeni\u00f8r. I denne artikel vil vi gennemg\u00e5 de v\u00e6sentligste <strong>Regler for design af stive-fleksible printkort<\/strong> n\u00f8dvendigt for at forhindre revner i sporene, delaminering og katastrofale fejl i drift, s\u00e5 dit design kan gennemf\u00f8re sin tilsigtede levetid.<\/p>\n<div style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules.jpg\" alt=\"En guide til designreglerne for stive-fleksible printkort\" width=\"600\" height=\"400\" class=\"aligncenter size-full wp-image-6300\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules-300x200.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Understanding_the_Rigid-Flex_Architecture_and_Materials\"><\/span>Forst\u00e5else af Rigid-Flex-arkitekturen og materialerne<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Et typisk stift-fleks-kort best\u00e5r ikke blot af to stive kort, der er forbundet med et b\u00e5ndkabel. De fleksible polyimidlag er integreret direkte i opbygningen af de stive sektioner.<\/p>\n<div style=\"text-align: center;\"><\/div>\n<h3><span class=\"ez-toc-section\" id=\"The_Core_Materials\"><\/span>De vigtigste materialer<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Polyimid (PI)<\/strong>: Rygraden i flex-sektionen. PI har en utrolig tr\u00e6kstyrke, termisk stabilitet (t\u00e5ler reflow-lodning) og kemisk modstandsdygtighed.<\/li>\n<li><strong>Valset, udgl\u00f8det (RA) kobber<\/strong>: Til dynamisk b\u00f8jning foretr\u00e6kkes RA-kobber frem for elektrolytisk afsat (ED) kobber. Dens vandrette kornstruktur g\u00f8r, at det kan b\u00f8jes millioner af gange uden at br\u00e6kke.<\/li>\n<li><strong>Coverlay kontra loddemaske<\/strong>: Man m\u00e5 ikke anvende standard LPI-loddemaske (Liquid Photoimageable) p\u00e5 den fleksible del; den vil straks revne. I stedet lamineres der et fleksibelt polyimid-coverlay over ledningsbanerne for at beskytte dem.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"The_Critical_Transition_Zone\"><\/span>Den kritiske overgangszone<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Det mest s\u00e5rbare omr\u00e5de i ethvert stiv-fleksibelt design er <strong>Overgangszone<\/strong>\u2014den pr\u00e6cise linje, hvor det stive FR4-materiale slutter, og det fleksible polyimid begynder. Dette overgangsomr\u00e5de fungerer som en kraftig sp\u00e6ndingskoncentrator. Hvis et printkort skal svigte mekanisk, sker det i 90% af tilf\u00e6ldene netop i overgangszonen.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dynamic_vs_Static_Flexing\"><\/span>Dynamisk kontra statisk b\u00f8jning<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Inden routing skal du definere applikationstypen:<br \/>* <strong>Statisk (b\u00f8jes ved montering)<\/strong>: Pladen b\u00f8jes \u00e9n gang under samlingen, s\u00e5 den passer ind i kabinettet, og bev\u00e6ger sig sj\u00e6ldent igen. Reglerne her er lidt mere fleksible.<br \/>* <strong>Dynamisk<\/strong>: Pladen vil konstant blive udsat for b\u00f8jning i l\u00f8bet af sin levetid (f.eks. et h\u00e6ngsel p\u00e5 en b\u00e6rbar computer eller en robotaktuator). Konstruktionsreglerne skal her overholdes n\u00f8je, for at pladen kan modst\u00e5 millioner af b\u00f8jningscyklusser.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Design_for_Rigid-Flex_Critical_Design_Rules\"><\/span>S\u00e5dan udformes konstruktioner til stiv-fleksible kredsl\u00f8b (kritiske designregler)<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\">F\u00f8lg disse tekniske retningslinjer.<\/p> <ol class=\"schema-how-to-steps\"><li class=\"schema-how-to-step\" id=\"how-to-step-1\"><strong class=\"schema-how-to-step-name\">Beregn den mindste b\u00f8jningsradius<\/strong> <p class=\"schema-how-to-step-text\">Du m\u00e5 aldrig b\u00f8je et flekskredsl\u00f8b som et stykke papir. Den mindste b\u00f8jningsradius bestemmer, hvor skarpt du kan b\u00f8je kortet uden at kobberstykkerne kn\u00e6kker.<br\/>Enkelt-\/dobbeltsidet Dynamic Flex: B\u00f8jningsradiusen b\u00f8r v\u00e6re 10 til 20 gange den fleksible sektionens samlede tykkelse.<br\/>Static Flex: B\u00f8jningsradiusen kan \u00f8ges til 10 gange tykkelsen. <br\/>(Eksempel: Hvis din fleksible sektion er 0,2 mm tyk, er den absolutte mindste dynamiske b\u00f8jningsradius 2,0 mm \u2013 4,0 mm).<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-2\"><strong class=\"schema-how-to-step-name\">Beskyt overgangszonen<\/strong> <p class=\"schema-how-to-step-text\">Placer aldrig viaer, pladerede gennemg\u00e5ende huller eller overflademonterede komponenter inden for 0,1 tommer (2,54 mm) fra overgangszonen. Den mekaniske belastning ved denne gr\u00e6nse vil rive viaerne fra hinanden og kn\u00e6kke komponenternes loddeforbindelser. Producenterne p\u00e5f\u00f8rer normalt en stribe epoxy eller silikone (tr\u00e6kaflastning) ved dette samlingspunkt.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-3\"><strong class=\"schema-how-to-step-name\">Brug t\u00e5redr\u00e5ber og afrundede spor<\/strong> <p class=\"schema-how-to-step-text\">Et 90-graders hj\u00f8rne i en ledningsbane udg\u00f8r en sp\u00e6ndingskoncentration. N\u00e5r printkortet b\u00f8jes, vil kobberet revne pr\u00e6cis ved det skarpe indvendige hj\u00f8rne. Brug altid bl\u00f8de, svungne buer, n\u00e5r du l\u00e6gger ledningsbaner i det omr\u00e5de, hvor kortet b\u00f8jes. Desuden b\u00f8r du tilf\u00f8je dr\u00e5beformede udvidelser til alle via- og pad-forbindelser for at forst\u00e6rke kobberforbindelsen d\u00e9r, hvor den m\u00f8der den ringformede kant.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-4\"><strong class=\"schema-how-to-step-name\">Fordel sporene (dobbeltsidet flex)<\/strong> <p class=\"schema-how-to-step-text\">Hvis der er kobberbaner p\u00e5 b\u00e5de oversiden og undersiden af det fleksible materiale, **m\u00e5 de ikke f\u00f8res direkte oven over hinanden**. Dette skaber lokal stivhed (ogs\u00e5 kaldet \u00bbI-bj\u00e6lke-effekten\u00ab) og \u00f8ger risikoen for brud. Placer i stedet banerne forskudt, s\u00e5 de skiftevis ligger p\u00e5 hver sin side, hvilket fordeler belastningen j\u00e6vnt.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-5\"><strong class=\"schema-how-to-step-name\">Brug krydsstreget kobberudfyldning<\/strong> <p class=\"schema-how-to-step-text\">Massive kobberjordflader g\u00f8r det fleksible omr\u00e5de utroligt stift og tilb\u00f8jeligt til at revne. Erstat massive kobberflader med et skraveret eller maskelignende gitterm\u00f8nster i de fleksible omr\u00e5der. Et typisk forhold er en ledning p\u00e5 0,2 mm med et vindue p\u00e5 0,4 mm. Dette bevarer den elektriske afsk\u00e6rmning, samtidig med at fleksibiliteten forbedres betydeligt.<\/p> <\/li><\/ol><\/div><p>For at opn\u00e5 maksimal mekanisk p\u00e5lidelighed og overholde IPC-2223-standarderne skal disse integreres <strong>Regler for design af stive-fleksible printkort<\/strong> ind i dit CAD-milj\u00f8.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Advanced_Considerations_High-Speed_and_HDI\"><\/span>Avancerede overvejelser: H\u00f8jhastighed og HDI<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Kombinationen af stiv-fleksible kredsl\u00f8b og avancerede elektriske krav g\u00f8r det hele endnu mere kompliceret.<\/p>\n<div style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules-1.jpg\" alt=\"En guide til designreglerne for stive-fleksible printkort\" width=\"600\" height=\"400\" class=\"aligncenter size-full wp-image-6301\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules-1-300x200.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/08\/Navigating-Rigid-Flex-PCB-Design-Rules-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/div>\n<p>Hvis du f\u00f8rer multi-gigabit-signaler p\u00e5 tv\u00e6rs af en fleksibel gr\u00e6nseflade, skal du sikre, at impedansen forbliver stabil. Dielektricitetskonstanten for polyimid (PI) adskiller sig fra FR4 (typisk omkring 3,2 mod 4,4), og udskiftning af et massivt jordplan med et skraveret jordplan \u00e6ndrer sporets kapacitans. Du skal bruge en 3D-feltl\u00f8ser til at genberegne sporets bredde specifikt for den fleksible sektion for at opretholde den impedans p\u00e5 85 ohm eller 100 ohm. For at f\u00e5 en dybere indsigt i signalintegritet kan du l\u00e6se vores guide om <a href=\"\/da\/blog\/essential-high-speed-pcb-routing-techniques\/\">Vigtige teknikker til h\u00f8jhastigheds-PCB-fr\u00e6sning<\/a>.<\/p>\n<p>Desuden kan du, hvis dine stive sektioner kr\u00e6ver ekstrem miniaturisering, integrere <a href=\"\/da\/blog\/mastering-any-layer-hdi-pcb-manufacturing\/\">Fremstilling af HDI-printkort med valgfri lagopbygning<\/a> inden for de stive zoner, idet de fleksible lag begr\u00e6nses til blot 1 eller 2 ledningsf\u00f8ringslag for at maksimere b\u00f8jningsdygtigheden.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_FAQ\"><\/span>Ofte stillede sp\u00f8rgsm\u00e5l (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-1\"><strong class=\"schema-faq-question\">Hvad er en \u00bbafstivning\u00ab i et fleksibelt printkort?<\/strong> <p class=\"schema-faq-answer\">En afstiver er et ekstra stykke stift materiale (normalt FR4, polyimid eller rustfrit st\u00e5l), der limes fast p\u00e5 et bestemt omr\u00e5de af det fleksible kredsl\u00f8b. Den bruges til at yde mekanisk st\u00f8tte under tunge komponenter (som f.eks. stik) eller til at g\u00f8re kanten af det fleksible kredsl\u00f8b tykkere, s\u00e5 det kan inds\u00e6ttes i et ZIF-stik (Zero Insertion Force).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-2\"><strong class=\"schema-faq-question\">Kan jeg placere komponenter p\u00e5 den fleksible del af printkortet?<\/strong> <p class=\"schema-faq-answer\">Ja, men der er nogle forbehold. Komponenter p\u00e5 det fleksible omr\u00e5de b\u00f8r v\u00e6re sm\u00e5 og placeret s\u00e5ledes, at deres l\u00e6ngste side ligger parallelt med b\u00f8jningsaksen, for at minimere belastningen p\u00e5 loddeforbindelserne. Derudover skal du anvende afstivninger under komponenter med mange ben eller tunge stik for at forhindre, at det fleksible materiale rives over.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-3\"><strong class=\"schema-faq-question\">Kan jeg bruge almindeligt elektrolytisk afsat (ED) kobber til et dynamisk flekskredsl\u00f8b?<\/strong> <p class=\"schema-faq-answer\">Det frar\u00e5des p\u00e5 det kraftigste. ED-kobber har en lodret krystalstruktur, der er tilb\u00f8jelig til at danne mikrorevner ved gentagen belastning. Valset, udgl\u00f8det (RA) kobber, med sin vandrette krystalstruktur, er langt bedre egnet til dynamisk b\u00f8jning.<\/p> <\/div> <\/div><h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Konklusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Mastering <strong>Regler for design af stive-fleksible printkort<\/strong> sl\u00e5r bro mellem elektrisk funktionalitet og mekanisk holdbarhed. Ved omhyggeligt at styre b\u00f8jningsradiusen, forst\u00e6rke overgangszonerne, placere ledningsbanerne forskudt og afrunde de geometriske hj\u00f8rner kan ingeni\u00f8rer designe yderst dynamiske forbindelser, der kan modst\u00e5 selv de h\u00e5rdeste milj\u00f8er. Selvom designfasen utvivlsomt er mere kr\u00e6vende, er den deraf f\u00f8lgende reduktion af produktets pladsbehov og forbedringer i p\u00e5lideligheden indsatsen v\u00e6rd.<\/p>","protected":false},"excerpt":{"rendered":"<p>Krydsfeltet mellem elektronik og mekanik Traditionelle stive printkort er statiske; n\u00e5r de f\u00f8rst er monteret, bev\u00e6ger de sig ikke. Men hvad sker der, n\u00e5r din elektronik skal foldes sammen til et lille b\u00e6rbart medicinsk udstyr, dreje sig inde i en robotarm eller modst\u00e5 de konstante vibrationer fra en rumfartsmotor? S\u00e5 v\u00e6lger du Rigid-Flex-teknologi. Rigid-Flex-printkort kombinerer stabiliteten fra standard [\u2026]<\/p>","protected":false},"author":1,"featured_media":6302,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"rigid flex PCB design rules","_yoast_wpseo_title":"Rigid-Flex PCB Design Rules for Maximum Mechanical Reliability","_yoast_wpseo_metadesc":"Explore essential rigid-flex PCB design rules, including bend radius, layer stackup, material selection, and mechanical reliability considerations for durable flexible circuits.","footnotes":""},"categories":[108],"tags":[505,507,506,508,504],"class_list":["post-6047","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-flexible-electronics","tag-mechanical-reliability","tag-pcb-design-rules","tag-polyimide","tag-rigid-flex-pcb-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - 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