{"id":3681,"date":"2025-07-25T08:49:00","date_gmt":"2025-07-25T00:49:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3681"},"modified":"2025-07-24T11:37:10","modified_gmt":"2025-07-24T03:37:10","slug":"common-issues-in-improving-pcb-reliability","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/","title":{"rendered":"Veelvoorkomende problemen bij het verbeteren van PCB-betrouwbaarheid"},"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\">Inhoudsopgave<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#How_to_Calculate_PCB_Impedance\" >Hoe PCB-impedantie berekenen?<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#1_Determine_PCB_Stackup_Geometry\" >1. PCB-stapeling en -geometrie bepalen<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#2_Identify_Dielectric_Constant_Dk_or_%CE%B5%E1%B5%A3\" >2. Di\u00eblektrische constante (Dk of \u03b5\u1d63) bepalen<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#3_Choose_Impedance_Calculation_Method\" >3. Impedantieberekeningsmethode kiezen<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#4_Use_Impedance_Calculators_or_Tools\" >4. Impedantieberekenaars of -hulpmiddelen gebruiken<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#5_Optimize_Design_Based_on_Results\" >5. Ontwerp optimaliseren op basis van resultaten<\/a><\/li><\/ul><\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#How_to_consider_signal_integrity_in_PCB_design\" >Hoe rekening houden met signaalintegriteit bij het PCB-ontwerp?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#1_Layout_Design\" >1. Lay-outontwerp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#2_Impedance_Matching\" >2. Impedantie-aanpassing<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#3_Signal_Line_Routing\" >3. Signaallijnroutering<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#4_Power_and_Grounding\" >4. Voeding en aarding<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#5_Simulation_Verification\" >5. Simulatieverificatie<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#How_to_Consider_Electromagnetic_Compatibility_EMC_in_PCB_Design\" >Hoe elektromagnetische compatibiliteit (EMC) overwegen bij het PCB-ontwerp?<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#1_PCB_Layout_for_EMC\" >1. PCB-indeling voor EMC<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#2_Grounding_Techniques\" >2. Aardingstechnieken<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#3_Filtering_Suppression\" >3. Filteren en onderdrukken<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#4_Shielding_Interface_Design\" >4. Afscherming en interfaceontwerp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#5_Simulation_Testing\" >5. Simulatie en testen<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#How_to_Consider_Power_Integrity_PI_in_PCB_Design\" >Hoe Power Integrity (PI) overwegen bij PCB-ontwerp?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#1_Power_Trace_Layout\" >1. Stroomspoorlay-out<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#2_Power_Filtering\" >2. Vermogen filteren<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#3_Power_and_Grounding\" >3. Voeding en aarding<\/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\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#4_Simulation_and_Validation\" >4. Simulatie en validatie<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#How_to_Incorporate_Design_for_Testability_DFT_in_PCB_Design\" >Hoe Design for Testability (DFT) integreren in PCB-ontwerp?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#1_Test_Points_and_Interfaces\" >1. Testpunten en interfaces<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#2_Board_Labeling_Silkscreen\" >2. Board-labeling (zeefdruk)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#3_Programmable_Test_Techniques\" >3. Programmeerbare testtechnieken<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#4_Simulation_and_Validation-2\" >4. Simulatie en validatie<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/common-issues-in-improving-pcb-reliability\/#Key_Design_Principles_Comparison\" >Belangrijkste ontwerpprincipes Vergelijking<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Calculate_PCB_Impedance\"><\/span>Hoe PCB-impedantie berekenen?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Het berekenen van PCB-impedantie zorgt voor signaalintegriteit, vooral voor circuits met hoge snelheden en RF-circuits.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Determine_PCB_Stackup_Geometry\"><\/span>1. PCB-stapeling en -geometrie bepalen<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Aantal lagen<\/strong>: Enkel, dubbel of meerlagig.<\/li>\n\n<li><strong>Spoorbreedte (W)<\/strong> en <strong>dikte (T)<\/strong>: Kritisch voor impedantieregeling.<\/li>\n\n<li><strong>Di\u00eblektrische dikte (H)<\/strong>: Afstand tussen de signaallaag en het referentievlak (bijv. aarde).<\/li>\n\n<li><strong>Koper gewicht<\/strong>: Gewoonlijk 0,5 oz (17,5 \u00b5m) tot 2 oz (70 \u00b5m).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Identify_Dielectric_Constant_Dk_or_%CE%B5%E1%B5%A3\"><\/span>2. Di\u00eblektrische constante (Dk of \u03b5\u1d63) bepalen<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>FR-4<\/strong>: ~4,3-4,8 (varieert met de frequentie).<\/li>\n\n<li><strong>Rogers RO4003C<\/strong>: ~3,38 (met laag verlies voor RF).<\/li>\n\n<li><strong>Polyimide<\/strong>: ~3,5 (flexibele printplaten).<\/li>\n\n<li><em>Noteant ~4,3-4,8)<\/em>: Dk neemt iets af bij hogere frequenties.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Choose_Impedance_Calculation_Method\"><\/span>3. Impedantieberekeningsmethode kiezen<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Microstrip<\/strong> (buitenste laag over massaplaat):<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"526\" height=\"74\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image.png\" alt=\"\" class=\"wp-image-3682\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image.png 526w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-300x42.png 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-18x3.png 18w\" sizes=\"auto, (max-width: 526px) 100vw, 526px\" \/><\/figure><\/div><p><strong>Striplijn<\/strong> (binnenste laag tussen twee grondvlakken):<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"319\" height=\"63\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-1.png\" alt=\"\" class=\"wp-image-3683\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-1.png 319w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-1-300x59.png 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-1-18x4.png 18w\" sizes=\"auto, (max-width: 319px) 100vw, 319px\" \/><\/figure><\/div><p><strong>Differentieel paar<\/strong>: Vereist afstand (S) tussen de sporen.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"304\" height=\"49\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-3.png\" alt=\"\" class=\"wp-image-3685\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-3.png 304w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-3-300x49.png 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-3-18x3.png 18w\" sizes=\"auto, (max-width: 304px) 100vw, 304px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Use_Impedance_Calculators_or_Tools\"><\/span>4. Impedantieberekenaars of -hulpmiddelen gebruiken<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Online gereedschap<\/strong>: Saturn PCB Toolkit, EEWeb Calculator.<\/li>\n\n<li><strong>PCB-software<\/strong>: Altium Designer, KiCad of Cadence hebben ingebouwde impedantieberekeningen.<\/li>\n\n<li><strong>EM Simulatoren<\/strong>: Ansys HFSS, CST (voor geavanceerde ontwerpen).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Optimize_Design_Based_on_Results\"><\/span>5. Ontwerp optimaliseren op basis van resultaten<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li>Aanpassen <strong>spoorbreedte<\/strong> (\u2191 breedte \u2192 \u2193 impedantie).<\/li>\n\n<li>Aanpassen <strong>di\u00eblektrische dikte<\/strong> (\u2191 H \u2192 \u2191 impedantie).<\/li>\n\n<li>Tweak <strong>Spoorafstand<\/strong> voor differenti\u00eble paren.<\/li>\n\n<li>Selecteer <strong>materialen<\/strong> met geschikte Dk (bijvoorbeeld Rogers voor RF).<\/li><\/ul><p><strong>Voorbeeldberekening (FR-4 Microstrip)<\/strong><br>Gegeven:<\/p><ul class=\"wp-block-list\"><li>Spoorbreedte (W) = 0,2 mm<\/li>\n\n<li>Di\u00eblektrische dikte (H) = 0,15 mm<\/li>\n\n<li>Koperdikte (T) = 0,035 mm<\/li>\n\n<li>\u03b5\u1d63 = 4,5<\/li><\/ul><p>Gebruik de microstripformule:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"491\" height=\"75\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-4.png\" alt=\"\" class=\"wp-image-3686\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-4.png 491w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-4-300x46.png 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/image-4-18x3.png 18w\" sizes=\"auto, (max-width: 491px) 100vw, 491px\" \/><\/figure><\/div><p>Komt overeen met de standaard 50\u03a9 impedantie voor RF-signalen.<\/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\/06\/PCB-electroplating-1.jpg\" alt=\"PCB betrouwbaarheid\" class=\"wp-image-3454\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/PCB-electroplating-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/PCB-electroplating-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/PCB-electroplating-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_consider_signal_integrity_in_PCB_design\"><\/span>Hoe signaalintegriteit te overwegen in <a href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/what-is-a-pcb-design\/\">PCB-ontwerp<\/a>?<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Layout_Design\"><\/span>1. Lay-outontwerp<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Bij het PCB layout ontwerp is het belangrijk om rekening te houden met de layout van signaallijnen, voedingslijnen en aardlijnen en om interferentie te vermijden die veroorzaakt wordt door het kruisen van signaallijnen, voedingslijnen en aardlijnen. Daarnaast is het essentieel om de lengte van signaallijnen te minimaliseren om overspraak en vertraging te verminderen.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Impedance_Matching\"><\/span>2. Impedantie-aanpassing<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Bij het ontwerpen van hogesnelheidssignaalkabels moet impedantieaanpassing worden uitgevoerd om ervoor te zorgen dat de impedantie van de signaalkabels overeenkomt met de impedantie van de signaalbron en de belasting, waardoor signaalreflectie en overspraak worden vermeden.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Signal_Line_Routing\"><\/span>3. Signaallijnroutering<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Bij het PCB-ontwerp is de routing van signaallijnen ook van invloed op de signaalintegriteit en moet deze aan bepaalde regels voldoen. Differenti\u00eble signaallijnen moeten bijvoorbeeld een bepaalde afstand houden en parallel worden gerouteerd, terwijl single-ended signaallijnen parallel aan massalijnen moeten worden gerouteerd en bochten in signaallijnen tot een minimum moeten worden beperkt.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Power_and_Grounding\"><\/span>4. Voeding en aarding<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Bij het PCB-ontwerp is het ontwerp van voeding en aarding ook van invloed op de signaalintegriteit. Er moet een stabiele voeding en aarding worden gebruikt en de weerstand en inductie van voeding en aarding moeten zoveel mogelijk worden geminimaliseerd.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Simulation_Verification\"><\/span>5. Simulatieverificatie<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Nadat het PCB-ontwerp is voltooid, is simulatieverificatie vereist om ervoor te zorgen dat de signaalintegriteit aan de vereisten voldoet. Door simulatie kunnen problemen zoals signaalvertraging, reflectie en overspraak worden opgespoord en kan het PCB-ontwerp worden geoptimaliseerd.<\/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-soldering-2.jpg\" alt=\"PCB betrouwbaarheid\" class=\"wp-image-3528\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/07\/PCB-soldering-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Consider_Electromagnetic_Compatibility_EMC_in_PCB_Design\"><\/span>Hoe elektromagnetische compatibiliteit (EMC) overwegen bij het PCB-ontwerp?<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_PCB_Layout_for_EMC\"><\/span>1. PCB-indeling voor EMC<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Parallel routeren minimaliseren<\/strong>: Vermijd lange parallelle lijnen tussen signaal- en voedings-\/massasporen om overspraak en elektromagnetische koppeling te beperken.<\/li>\n\n<li><strong>Kritieke signaalisolatie<\/strong>: Scheid snelle (bijv. klokken, RF) en gevoelige analoge signalen van lawaaierige circuits (bijv. schakelende voedingen).<\/li>\n\n<li><strong>Laagopbouwstrategie<\/strong>:<\/li>\n\n<li>Gebruik stevige aardvlakken naast de signaallagen om afscherming te bieden.<\/li>\n\n<li>Routeer hogesnelheidssignalen op binnenlagen tussen massaplaten voor insluiting.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Grounding_Techniques\"><\/span>2. Aardingstechnieken<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Aardingsplaten met lage impedantie<\/strong>: Gebruik ononderbroken aardvlakken om aardlussen te minimaliseren en uitgestraalde emissies te verminderen.<\/li>\n\n<li><strong>Grond zorgvuldig verdelen<\/strong>: Scheid analoge\/digitale aarding alleen als dat nodig is, met een enkel aansluitpunt (bijv. ferrietkraal of 0\u03a9 weerstand).<\/li>\n\n<li><strong>Via Stitching<\/strong>: Plaats meerdere aardingsvias rond hoogfrequente sporen of randen van de printplaat om holteresonanties te onderdrukken.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Filtering_Suppression\"><\/span>3. Filteren en onderdrukken<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Ferriet Kralen<\/strong>: Toevoegen aan voedings-\/IO-lijnen om hoogfrequente ruis te blokkeren.<\/li>\n\n<li><strong>Ontkoppelingscondensatoren<\/strong>: Plaats in de buurt van de voedingspinnen van het IC (bijv. 0,1\u03bcF + 1\u03bcF) om ruis van hoge en middenfrequenties te filteren.<\/li>\n\n<li><strong>Gemeenschappelijke-mode smoorspoelen<\/strong>: Gebruik op differenti\u00eble paren (bijv. USB, Ethernet) om common-mode straling te onderdrukken.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Shielding_Interface_Design\"><\/span>4. Afscherming en interfaceontwerp<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Kabelafscherming<\/strong>: Gebruik afgeschermde connectoren (bijv. USB, HDMI) met 360\u00b0 aarding naar het chassis.<\/li>\n\n<li><strong>Afscherming op directieniveau<\/strong>: Plaats metalen blikken of geleidende coatings over gevoelige RF-circuits.<\/li>\n\n<li><strong>Randbescherming<\/strong>: Leid gevoelige sporen weg van de randen van de printplaat; gebruik afschermsporen of geaard kopergiet eromheen.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Simulation_Testing\"><\/span>5. Simulatie en testen<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Analyse v\u00f3\u00f3r het ontwerp<\/strong>: Gebruik tools zoals ANSYS HFSS of CST om stralingshaarden te modelleren.<\/li>\n\n<li><strong>Verificatie na layout<\/strong>:<\/li>\n\n<li>Nabij veld scans uitvoeren om emissiebronnen te identificeren.<\/li>\n\n<li>Conformiteitstests uitvoeren (bijv. FCC, CE) voor uitgestraalde\/geleide emissies.<\/li>\n\n<li><strong>Ontwerp Iteratie<\/strong>: Optimaliseren op basis van de testresultaten (bijvoorbeeld afsluitweerstanden toevoegen of de spoorafstand aanpassen).<\/li><\/ul><p><strong>Voorbeeldoplossingen<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Een 100MHz klok straalt overmatig: Voeg seri\u00eble afsluitweerstanden toe of routeer tussen massaplaten.<\/li>\n\n<li>Ruis bij schakelende voeding: implementeer \u03c0-filters (LC) aan de ingang\/uitgang.<\/li><\/ul><p>Door deze praktijken te integreren, kunnen PCB's voldoen aan de EMC-normen (bijv. IEC 61000) en tegelijkertijd kostbare herontwerpen minimaliseren. Altijd vroeg prototypen en testen!<\/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\/06\/pcba-2.jpg\" alt=\"PCB betrouwbaarheid\" class=\"wp-image-3233\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/pcba-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/pcba-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/pcba-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Consider_Power_Integrity_PI_in_PCB_Design\"><\/span>Hoe Power Integrity (PI) overwegen bij PCB-ontwerp?<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Power_Trace_Layout\"><\/span>1. Stroomspoorlay-out<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Korte en brede sporen<\/strong>: Minimaliseer weerstand (R) en parasitaire inductantie (L) om spanningsverlies en ruis te verminderen.<\/li>\n\n<li><strong>Parallel routeren vermijden met signaalsporen<\/strong>: Voorkomen dat spanningsruis doorwerkt in gevoelige signalen (bijvoorbeeld klokken, analoge circuits).<\/li>\n\n<li><strong>Laagstrategie<\/strong>:<\/li>\n\n<li>In meerlaagse borden moeten hele lagen worden gebruikt voor voedings- en aardingsvlakken.<\/li>\n\n<li>Kritische stroomrails (bijvoorbeeld CPU-kernspanning) moeten speciale stroomvlakken hebben.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Power_Filtering\"><\/span>2. Vermogen filteren<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Ontkoppelingscondensatoren<\/strong>:<\/li>\n\n<li>Bulk elektrolytische condensatoren (10-100\u03bcF) bij stroomingangen om de spanning te stabiliseren.<\/li>\n\n<li>Kleine keramische condensatoren (0,1\u03bcF) in de buurt van IC-pennen om hoogfrequente ruis te filteren.<\/li>\n\n<li><strong>LC-filters<\/strong>:<\/li>\n\n<li>Voeg \u03c0-filters (condensator + inductor) toe voor ruisgevoelige modules (bijvoorbeeld PLL's).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Power_and_Grounding\"><\/span>3. Voeding en aarding<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Returnpaden met lage impedantie<\/strong>:<\/li>\n\n<li>Gebruik stevige aardvlakken; vermijd splitsingen die impedantiediscontinu\u00efteiten veroorzaken.<\/li>\n\n<li>Meerdere vias om voedings-\/ massavlakken te verbinden (vermindert via-inductantie).<\/li>\n\n<li><strong>Ster-aarding<\/strong>:<\/li>\n\n<li>Scheid hoogvermogen- en gevoelige circuits, met enkelpolige aarding.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Simulation_and_Validation\"><\/span>4. Simulatie en validatie<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>PDN-analyse (Power Delivery Network)<\/strong>:<\/li>\n\n<li>Doelimpedantie: ( Z_{doel}} = \\frac{{Delta V}{{Delta I} ).<\/li>\n\n<li>Gereedschappen: ANSYS SIwave, Cadence Sigrity.<\/li>\n\n<li><strong>Rimpeling en ruis testen<\/strong>:<\/li>\n\n<li>Controleer de ruisniveaus met oscilloscopen of simulaties.<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Incorporate_Design_for_Testability_DFT_in_PCB_Design\"><\/span>Hoe Design for Testability (DFT) integreren in PCB-ontwerp?<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Test_Points_and_Interfaces\"><\/span>1. Testpunten en interfaces<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Kritieke signaaltestpunten<\/strong>:<\/li>\n\n<li>Zorg voor vias of pads (diameter \u22651 mm, tussenruimte \u22652,54 mm) voor toegang tot de sonde.<\/li>\n\n<li>Label de testpunten (bijvoorbeeld TP1, TP2).<\/li>\n\n<li><strong>Standaard interfaces<\/strong>:<\/li>\n\n<li>Plaats JTAG-, UART- of SWD-interfaces in de buurt van de randen van de printplaat.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Board_Labeling_Silkscreen\"><\/span>2. Board-labeling (zeefdruk)<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Component Markeringen<\/strong>:<\/li>\n\n<li>Label referentieaanduidingen (bijv. R1, C2), polariteit (+\/-) en pin 1.<\/li>\n\n<li>Gebruik contrastrijke zeefdruk (wit\/zwart).<\/li>\n\n<li><strong>Functionele zones<\/strong>:<\/li>\n\n<li>Omlijn gebieden (bijv. \"Vermogenssectie\") voor gemakkelijke identificatie.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Programmable_Test_Techniques\"><\/span>3. Programmeerbare testtechnieken<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>Grenswaarde scannen (JTAG)<\/strong>:<\/li>\n\n<li>IEEE 1149.1-compatibele IC's (bijv. FPGA's, MCU's) maken interconnectietesten mogelijk.<\/li>\n\n<li><strong>Geautomatiseerde testapparatuur (ATE)<\/strong>:<\/li>\n\n<li>Reserveer interfaces voor testopstellingen (bijv. pogo pin pads).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Simulation_and_Validation-2\"><\/span>4. Simulatie en validatie<span class=\"ez-toc-section-end\"><\/span><\/h3><ul class=\"wp-block-list\"><li><strong>DFT Regelcontroles<\/strong>:<\/li>\n\n<li>Zorg voor testpuntdekking (bijv. &gt;90% van toegankelijke netten).<\/li>\n\n<li><strong>Foutmodusanalyse<\/strong>:<\/li>\n\n<li>Testcircuits valideren via SPICE-simulaties.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Key_Design_Principles_Comparison\"><\/span>Belangrijkste ontwerpprincipes Vergelijking<span class=\"ez-toc-section-end\"><\/span><\/h3><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Integriteit van vermogen (PI)<\/strong><\/th><th><strong>Ontwerp voor testbaarheid (DFT)<\/strong><\/th><\/tr><\/thead><tbody><tr><td>Stroomverdeling met lage impedantie<\/td><td>Fysieke toegankelijkheid testpunt<\/td><\/tr><tr><td>Optimalisatie ontkoppelingscondensator<\/td><td>JTAG\/grensverleggende scanondersteuning<\/td><\/tr><tr><td>Vermogen-signaalkoppeling minimaliseren<\/td><td>Duidelijke etikettering van onderdelen\/interfaces<\/td><\/tr><tr><td>PDN-simulatie en rimpelanalyse<\/td><td>ATE-compatibel ontwerp<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Voorbeelden<\/strong>:<\/p><ul class=\"wp-block-list\"><li><strong>PI optimalisatie<\/strong>: DDR4 geheugenvoedingsvlakken met meerdere 0805 0,1\u03bcF caps (doelimpedantie \u22640,1\u03a9).<\/li>\n\n<li><strong>DFT-implementatie<\/strong>: Industri\u00eble besturingsprintplaat met 20 testpunten voor geautomatiseerde tests met vliegende sondes.<\/li><\/ul><p>Door PI en DFT systematisch aan te pakken, kunnen ontwerpers de vermogensprestaties, testeffici\u00ebntie en productiebetrouwbaarheid verbeteren.<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Hoe PCB-impedantie berekenen? Het berekenen van de impedantie van de printplaat garandeert de signaalintegriteit, vooral voor hogesnelheids- en RF-circuits. 1. Bepaal PCB Stackup &amp; Geometrie 2. 2. Identificeer de di\u00eblektrische constante (Dk of \u03b5\u1d63) 3. Kies de impedantie berekeningsmethode Microstrip (buitenste laag over massaplaat): Striplijn (binnenlaag tussen twee massaplaten): Differentieel paar: Vereist afstand (S) tussen [...]<\/p>","protected":false},"author":1,"featured_media":3514,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[112],"tags":[111,330],"class_list":["post-3681","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-pcb","tag-pcb-reliability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Common Issues in Improving PCB Reliability - Topfastpcb<\/title>\n<meta name=\"description\" content=\"Learn key strategies to improve PCB reliability, including impedance calculation, signal integrity, EMC, power integrity, and DFT. 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