{"id":3841,"date":"2025-08-05T19:16:50","date_gmt":"2025-08-05T11:16:50","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3841"},"modified":"2025-08-05T19:23:49","modified_gmt":"2025-08-05T11:23:49","slug":"pcb-annular-ring","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/nl\/blog\/pcb-annular-ring\/","title":{"rendered":"PCB ring"},"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\/pcb-annular-ring\/#The_Core_Function_and_Design_Specifications_of_PCB_Ring_Circuits\" >De kernfunctie en ontwerpspecificaties van PCB ringcircuits<\/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\/pcb-annular-ring\/#Three_Morphological_States_of_Annular_Rings\" >Drie morfologische toestanden van ringvormige ringen<\/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\/pcb-annular-ring\/#Engineering_Calculations_for_Annular_Ring_Dimensions\" >Technische berekeningen voor ringafmetingen<\/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\/pcb-annular-ring\/#Industry_Standards_Process_Control\" >Industriestandaarden en procesbeheersing<\/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\/pcb-annular-ring\/#Teardrop_Reinforcement_Engineering_Benefits\" >Teardrop wapening: Technische voordelen<\/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\/pcb-annular-ring\/#Common_Issues_Solutions\" >Veelvoorkomende problemen en oplossingen<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Core_Function_and_Design_Specifications_of_PCB_Ring_Circuits\"><\/span>De kernfunctie en ontwerpspecificaties van PCB ringcircuits<span class=\"ez-toc-section-end\"><\/span><\/h2><p>In <a href=\"https:\/\/www.topfastpcb.com\/nl\/products\/\">Productie van printplaten<\/a>de <strong>ringvormige ring<\/strong> is een fundamentele structuur die zorgt voor betrouwbare elektrische verbindingen. Deze cirkelvormige metalen pad zet de componentdraden vast door een centraal gat en vormt stabiele elektrische verbindingen via solderen. De bewerkingsnauwkeurigheid van ringvormige ringen be\u00efnvloedt niet alleen de prestaties van individuele printplaten, maar ook de productieopbrengst bij massaproductie.<\/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\/08\/PCB-Annular-Ring-2.jpg\" alt=\"PCB ring\" class=\"wp-image-3846\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Three_Morphological_States_of_Annular_Rings\"><\/span>Drie morfologische toestanden van ringvormige ringen<span class=\"ez-toc-section-end\"><\/span><\/h3><ol class=\"wp-block-list\"><li><strong>Normale staat<\/strong><br>Het geboorde gat is perfect gecentreerd in de pad, waardoor een volledige koperen ring wordt gevormd. Deze ideale toestand zorgt voor een optimaal stroomvoerend vermogen en mechanische sterkte, en vermindert de weerstand van de verbinding door <strong>15-20%<\/strong>.<\/li>\n\n<li><strong>Raaklijn<\/strong><br>Wanneer er vanuit het midden wordt geboord, maakt de koperen ring aan \u00e9\u00e9n kant contact met de rand van het gat, waardoor er een tangentiaal ontstaat. Dit komt vaak voor bij boren met hoge snelheid en kan de stroomcapaciteit verminderen met <strong>30-40%<\/strong>. Moderne printplatenfabrieken gebruiken vision inspectiesystemen om raaklijnen in realtime te controleren.<\/li>\n\n<li><strong>Breakout-staat<\/strong><br>Een ernstig defect waarbij de koperen ring volledig gebroken is, wat een open circuit veroorzaakt. Dit gebeurt meestal wanneer de boorafwijking groter is dan <strong>0,1 mm<\/strong> en is een belangrijke oorzaak van PCB-afkeur bij kwaliteitscontrole. <a href=\"https:\/\/www.topfastpcb.com\/nl\/blog\/what-is-aoi-automated-optical-inspection\/\">Geautomatiseerde optische inspectie<\/a> (AOI) systemen zulke defecten effectief detecteren.<\/li><\/ol><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engineering_Calculations_for_Annular_Ring_Dimensions\"><\/span>Technische berekeningen voor ringafmetingen<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Formule buitenring (OAR)<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"464\" height=\"71\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula.jpg\" alt=\"PCB ring\" class=\"wp-image-3842\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula.jpg 464w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula-300x46.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Outer-Annular-Ring-OAR-Formula-18x3.jpg 18w\" sizes=\"auto, (max-width: 464px) 100vw, 464px\" \/><\/figure><\/div><p>Rekening houden met de dikte van de beplating:<\/p><ul class=\"wp-block-list\"><li><strong>PTH (geplateerd door gat)<\/strong>: Toevoegen <strong>0,10 mm<\/strong> beplatingsvergoeding<\/li>\n\n<li><strong>NPTH (niet-geplateerd doorgaand gat)<\/strong>: Geen extra toeslag<\/li><\/ul><p><em>Voorbeeld berekening<\/em>:<br>Voor een <strong>0,60 mm pad<\/strong> en <strong>0,30 mm afgewerkt gat (PTH)<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"473\" height=\"79\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness.jpg\" alt=\"PCB ring\" class=\"wp-image-3843\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness.jpg 473w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness-300x50.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Accounting-for-plating-thickness-18x3.jpg 18w\" sizes=\"auto, (max-width: 473px) 100vw, 473px\" \/><\/figure><\/div><p><strong>Overwegingen voor de binnenring (IAR)<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"506\" height=\"69\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations.jpg\" alt=\"PCB ring\" class=\"wp-image-3844\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations.jpg 506w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations-300x41.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/Inner-Annular-Ring-IAR-Considerations-18x2.jpg 18w\" sizes=\"auto, (max-width: 506px) 100vw, 506px\" \/><\/figure><\/div><p>Sleutelfactoren voor binnenlagen:<\/p><ul class=\"wp-block-list\"><li>Compensatie voor lamineringsfouten<\/li>\n\n<li>Variaties in de koperdikte van de binnenlaag<\/li>\n\n<li>Nauwkeurigheid bij het uitlijnen van meerlagige printplaten<\/li><\/ul><p><em>Voorbeeld berekening<\/em>:<br>Voor een <strong>0,50 mm binnenkussen<\/strong> en <strong>0,20 mm afgewerkt gat (PTH)<\/strong>:<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"403\" height=\"72\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole.jpg\" alt=\"PCB ring\" class=\"wp-image-3845\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole.jpg 403w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole-300x54.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/0.20mm-finished-hole-18x3.jpg 18w\" sizes=\"auto, (max-width: 403px) 100vw, 403px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Industry_Standards_Process_Control\"><\/span>Industriestandaarden en procesbeheersing<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Per <strong>IPC-6012<\/strong>De vereisten voor ringringen vari\u00ebren per type printplaat:<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Type PCB<\/th><th>Min. Buitenring<\/th><th>Min. Binnenring<\/th><\/tr><\/thead><tbody><tr><td>Stijf<\/td><td>\u22650,05mm<\/td><td>\u22650,01mm<\/td><\/tr><tr><td>Flexibel<\/td><td>\u22650,075mm<\/td><td>\u22650,025mm<\/td><\/tr><tr><td>Rigid-Flex<\/td><td>\u22650,06mm<\/td><td>\u22650,015mm<\/td><\/tr><\/tbody><\/table><\/figure><p><strong>Ontwerpaanbevelingen ~4,3-4,8)<\/strong>:<br>Toestaan <strong>0,02-0,03 mm<\/strong> procesmarge<br>\u2714 Vergroot de ringbreedte met <strong>20%<\/strong> voor hoogfrequente schakelingen<br>\u2714 Controleer stroomvoercapaciteit voor hoogvermogensporen<br>Thermische spanningseffecten op ringvormige ringen simuleren<\/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\/08\/PCB-Annular-Ring-1.jpg\" alt=\"PCB ring\" class=\"wp-image-3847\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/08\/PCB-Annular-Ring-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Teardrop_Reinforcement_Engineering_Benefits\"><\/span>Teardrop wapening: Technische voordelen<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Teardrops vergroten de betrouwbaarheid van ringringen door:<\/p><ol class=\"wp-block-list\"><li><strong>Mechanische sterkte<\/strong>: Verhoogt de trekweerstand met <strong>40%+<\/strong><\/li>\n\n<li><strong>Procestolerantie<\/strong>: Compenseert voor <strong>\u00b10,05mm<\/strong> boorafwijkingen<\/li>\n\n<li><strong>Betrouwbaarheid<\/strong>: Vermindert microscheurtjes door thermische cycli<\/li>\n\n<li><strong>Repareerbaarheid<\/strong>: Verzacht zwakke verbindingen van kleine tangency<\/li><\/ol><p><strong>Implementatierichtlijnen<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Teardrop lengte = <strong>1.5-2x<\/strong> spoorbreedte<\/li>\n\n<li>Overgangsradius \u2265 <strong>0,1 mm<\/strong><\/li>\n\n<li>Vorm optimaliseren voor impedantiecontinu\u00efteit in signalen met hoge snelheid<\/li>\n\n<li>Gebruik micro-teardruppels (<strong>\u22640,15mm<\/strong>) in gebieden met een hoge dichtheid<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Issues_Solutions\"><\/span>Veelvoorkomende problemen en oplossingen<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Verkeerde uitlijning van boren voorkomen<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Gebruik CNC boren met hoge precisie (<strong>\u22640.025mm<\/strong> nauwkeurigheid)<\/li>\n\n<li>Boorparameters optimaliseren (toerental, voedingssnelheid)<\/li>\n\n<li>CCD-uitlijnsystemen implementeren<\/li>\n\n<li>Vervang boren elke <strong>1500-2000<\/strong> gaten<\/li><\/ol><p><strong>Onvoldoende ringvormige ringen aanpakken<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Paddiameter vergroten (voorkeursoplossing)<\/li>\n\n<li>Gaten verkleinen (denk aan afleidingen voor componenten)<\/li>\n\n<li>Gebruik asymmetrische padontwerpen<\/li>\n\n<li>Via-in-pad technologie toepassen (secundaire plating vereist)<\/li><\/ol><p><strong>Kwaliteitscontrole in massaproductie<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Volledig dimensionale inspectie van eerste artikelen<\/li>\n\n<li>Batchbemonstering met dwarsdoorsnedeanalyse<\/li>\n\n<li>Real-time boorpositiebewaking<\/li>\n\n<li>SPC-controlediagrammen opstellen voor ringbreedte<\/li><\/ol><p>Door het implementeren van een systematisch ontwerp en strenge procescontroles kunnen ringringen voor printplaten voldoen aan hoge betrouwbaarheidseisen en zorgen voor langdurige stabiliteit in elektronische producten. Ingenieurs moeten tijdens de ontwerpfase nauw samenwerken met fabrikanten om de specificaties in evenwicht te brengen met de productiemogelijkheden.<\/p>","protected":false},"excerpt":{"rendered":"<p>Definitie, berekeningsmethoden, productienormen en veelvoorkomende problemen met betrekking tot PCB ringringen.Dit artikel gaat in op de kritieke rol van ringringen in printplaatontwerp en biedt professionele ontwerpaanbevelingen en procescontrolepunten om de betrouwbaarheid van PCB's te optimaliseren.<\/p>","protected":false},"author":1,"featured_media":3848,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[112],"tags":[338],"class_list":["post-3841","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-pcb-annular-ring"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB Annular Ring - 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