{"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\/fr\/blog\/pcb-annular-ring\/","title":{"rendered":"Bague annulaire du PCB"},"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\">Table des mati\u00e8res<\/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\/fr\/blog\/pcb-annular-ring\/#The_Core_Function_and_Design_Specifications_of_PCB_Ring_Circuits\" >Fonction principale et sp\u00e9cifications de conception des circuits imprim\u00e9s en anneau<\/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\/fr\/blog\/pcb-annular-ring\/#Three_Morphological_States_of_Annular_Rings\" >Trois \u00e9tats morphologiques des anneaux annulaires<\/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\/fr\/blog\/pcb-annular-ring\/#Engineering_Calculations_for_Annular_Ring_Dimensions\" >Calculs techniques pour les dimensions de l'anneau annulaire<\/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\/fr\/blog\/pcb-annular-ring\/#Industry_Standards_Process_Control\" >Normes industrielles et contr\u00f4le des processus<\/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\/fr\/blog\/pcb-annular-ring\/#Teardrop_Reinforcement_Engineering_Benefits\" >Renforcement en forme de goutte d'eau : Avantages techniques<\/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\/fr\/blog\/pcb-annular-ring\/#Common_Issues_Solutions\" >Probl\u00e8mes courants et solutions<\/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>Fonction principale et sp\u00e9cifications de conception des circuits imprim\u00e9s en anneau<span class=\"ez-toc-section-end\"><\/span><\/h2><p>En <a href=\"https:\/\/www.topfastpcb.com\/fr\/products\/\">la fabrication de cartes de circuits imprim\u00e9s (PCB)<\/a>, le <strong>anneau annulaire<\/strong> est une structure fondamentale qui garantit des connexions \u00e9lectriques fiables. Cette pastille m\u00e9tallique circulaire fixe les fils des composants \u00e0 travers un trou central, formant ainsi des connexions \u00e9lectriques stables par soudure. La pr\u00e9cision d'usinage des anneaux annulaires influe non seulement sur les performances des cartes individuelles, mais aussi sur le rendement de la production en s\u00e9rie.<\/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=\"Bague annulaire du PCB\" 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>Trois \u00e9tats morphologiques des anneaux annulaires<span class=\"ez-toc-section-end\"><\/span><\/h3><ol class=\"wp-block-list\"><li><strong>\u00c9tat normal<\/strong><br>Le trou perc\u00e9 est parfaitement centr\u00e9 dans le tampon, formant un anneau de cuivre complet. Cette condition id\u00e9ale garantit une capacit\u00e9 de transport de courant et une r\u00e9sistance m\u00e9canique optimales, r\u00e9duisant ainsi la r\u00e9sistance de la connexion. <strong>15-20%<\/strong>.<\/li>\n\n<li><strong>\u00c9tat de la tangente<\/strong><br>Lorsque le per\u00e7age s'\u00e9carte du centre, l'anneau de cuivre entre en contact avec le bord du trou d'un c\u00f4t\u00e9, ce qui cr\u00e9e une condition de tangence. Fr\u00e9quente dans les forages \u00e0 grande vitesse, cette situation peut r\u00e9duire la capacit\u00e9 de courant de <strong>30-40%<\/strong>. Les usines modernes de circuits imprim\u00e9s utilisent des syst\u00e8mes d'inspection par vision pour contr\u00f4ler les occurrences de tangentes en temps r\u00e9el.<\/li>\n\n<li><strong>\u00c9tat de rupture<\/strong><br>D\u00e9faut grave o\u00f9 l'anneau de cuivre est compl\u00e8tement cass\u00e9, provoquant un circuit ouvert. Cela se produit g\u00e9n\u00e9ralement lorsque l'\u00e9cart de forage d\u00e9passe <strong>0,1 mm<\/strong> et constitue une cause majeure de rejet des PCB dans le cadre du contr\u00f4le de qualit\u00e9. <a href=\"https:\/\/www.topfastpcb.com\/fr\/blog\/what-is-aoi-automated-optical-inspection\/\">Inspection optique automatis\u00e9e<\/a> (AOI) permettent de d\u00e9tecter efficacement ces d\u00e9fauts.<\/li><\/ol><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engineering_Calculations_for_Annular_Ring_Dimensions\"><\/span>Calculs techniques pour les dimensions de l'anneau annulaire<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Formule de l'anneau annulaire ext\u00e9rieur (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=\"Bague annulaire du PCB\" 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>Prise en compte de l'\u00e9paisseur du placage :<\/p><ul class=\"wp-block-list\"><li><strong>PTH (Plated Through Hole)<\/strong>: Ajouter <strong>0,10 mm<\/strong> indemnit\u00e9 de placage<\/li>\n\n<li><strong>NPTH (Trou traversant non plaqu\u00e9)<\/strong>: Pas d'allocation suppl\u00e9mentaire<\/li><\/ul><p><em>Exemple de calcul<\/em>:<br>Pour un <strong>Tampon de 0,60 mm<\/strong> et <strong>Trou fini de 0,30 mm (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=\"Bague annulaire du PCB\" 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>Consid\u00e9rations relatives \u00e0 l'anneau annulaire int\u00e9rieur (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=\"Bague annulaire du PCB\" 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>Facteurs cl\u00e9s pour les couches internes :<\/p><ul class=\"wp-block-list\"><li>Compensation du d\u00e9salignement de la stratification<\/li>\n\n<li>Variations de l'\u00e9paisseur de la couche interne de cuivre<\/li>\n\n<li>Pr\u00e9cision d'alignement dans les cartes multicouches<\/li><\/ul><p><em>Exemple de calcul<\/em>:<br>Pour un <strong>Coussinet int\u00e9rieur de 0,50 mm<\/strong> et <strong>Trou fini de 0,20 mm (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=\"Bague annulaire du PCB\" 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>Normes industrielles et contr\u00f4le des processus<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Par <strong>IPC-6012<\/strong>Les exigences en mati\u00e8re de bague annulaire varient selon le type de PCB :<\/p><figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Type de PCB<\/th><th>Min. Anneau annulaire ext\u00e9rieur<\/th><th>Min. Anneau annulaire int\u00e9rieur<\/th><\/tr><\/thead><tbody><tr><td>Rigide<\/td><td>\u22650,05mm<\/td><td>\u22650,01mm<\/td><\/tr><tr><td>Flexible<\/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>Recommandations en mati\u00e8re de conception<\/strong>:<br>\u2714 Permettre <strong>0,02-0,03 mm<\/strong> marge du processus<br>\u2714 Augmenter la largeur de l'anneau de <strong>20%<\/strong> pour les circuits \u00e0 haute fr\u00e9quence<br>\u2714 V\u00e9rifier la capacit\u00e9 de transport de courant pour les traces de haute puissance<br>\u2714 Simuler les effets de la contrainte thermique sur les anneaux annulaires<\/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=\"Bague annulaire du PCB\" 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>Renforcement en forme de goutte d'eau : Avantages techniques<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Les gouttes d'eau am\u00e9liorent la fiabilit\u00e9 de l'anneau annulaire :<\/p><ol class=\"wp-block-list\"><li><strong>R\u00e9sistance m\u00e9canique<\/strong>: Augmente la r\u00e9sistance \u00e0 la traction de <strong>40%+<\/strong><\/li>\n\n<li><strong>Tol\u00e9rance du processus<\/strong>: Compense les <strong>\u00b10,05 mm<\/strong> \u00e9carts de forage<\/li>\n\n<li><strong>Fiabilit\u00e9<\/strong>: R\u00e9duit les microfissures dues aux cycles thermiques<\/li>\n\n<li><strong>R\u00e9parabilit\u00e9<\/strong>: Att\u00e9nue les connexions faibles dues \u00e0 une tangence mineure<\/li><\/ol><p><strong>Lignes directrices pour la mise en \u0153uvre<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Longueur de la larme = <strong>1.5-2x<\/strong> largeur de la trace<\/li>\n\n<li>Rayon de transition \u2265 <strong>0,1 mm<\/strong><\/li>\n\n<li>Optimiser la forme pour la continuit\u00e9 de l'imp\u00e9dance dans les signaux \u00e0 grande vitesse<\/li>\n\n<li>Utiliser des micro-teardrops (<strong>\u22640.15mm<\/strong>) dans les zones \u00e0 forte densit\u00e9<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Issues_Solutions\"><\/span>Probl\u00e8mes courants et solutions<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Pr\u00e9vention du d\u00e9salignement des forets<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Utilisation d'un syst\u00e8me de per\u00e7age CNC de haute pr\u00e9cision (<strong>\u22640.025mm<\/strong> pr\u00e9cision)<\/li>\n\n<li>Optimiser les param\u00e8tres de forage (vitesse de rotation, vitesse d'avance)<\/li>\n\n<li>Mise en \u0153uvre des syst\u00e8mes d'alignement des CCD<\/li>\n\n<li>Remplacer les forets tous les <strong>1500-2000<\/strong> trous<\/li><\/ol><p><strong>Rem\u00e9dier \u00e0 l'insuffisance des anneaux annulaires<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Augmenter le diam\u00e8tre des tampons (solution pr\u00e9f\u00e9r\u00e9e)<\/li>\n\n<li>R\u00e9duire la taille des trous (tenir compte des fils des composants)<\/li>\n\n<li>Utiliser des motifs de tampons asym\u00e9triques<\/li>\n\n<li>Appliquer la technologie via-in-pad (n\u00e9cessite un placage secondaire)<\/li><\/ol><p><strong>Contr\u00f4le de la qualit\u00e9 dans la production de masse<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Inspection dimensionnelle compl\u00e8te des premiers articles<\/li>\n\n<li>\u00c9chantillonnage par lots avec analyse de la section transversale<\/li>\n\n<li>Contr\u00f4le en temps r\u00e9el de la position de la foreuse<\/li>\n\n<li>\u00c9tablir des cartes de contr\u00f4le SPC pour la largeur des anneaux<\/li><\/ol><p>En mettant en \u0153uvre une conception syst\u00e9matique et des contr\u00f4les de processus stricts, les anneaux annulaires pour circuits imprim\u00e9s peuvent r\u00e9pondre \u00e0 des exigences de haute fiabilit\u00e9, garantissant ainsi la stabilit\u00e9 \u00e0 long terme des produits \u00e9lectroniques. Les ing\u00e9nieurs doivent collaborer \u00e9troitement avec les fabricants pendant la phase de conception afin d'\u00e9quilibrer les sp\u00e9cifications et les capacit\u00e9s de production.<\/p>","protected":false},"excerpt":{"rendered":"<p>D\u00e9finition, m\u00e9thodes de calcul, normes de fabrication et probl\u00e8mes courants li\u00e9s aux anneaux annulaires des circuits imprim\u00e9s.Cet article se penche sur le r\u00f4le critique des anneaux annulaires dans la conception des circuits imprim\u00e9s et propose des recommandations professionnelles en mati\u00e8re de conception et des points de contr\u00f4le des processus pour optimiser la fiabilit\u00e9 des circuits imprim\u00e9s.<\/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 - 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