[{"data":1,"prerenderedAt":398},["ShallowReactive",2],{"blog-common-pcb-manufacturing-defects-and-how-to-avoid-fr":3,"header-nav-fr":71},{"title":4,"description":5,"date":6,"category":7,"image":8,"readingTime":9,"wordCount":10,"timeRequired":11,"htmlContent":12,"tags":13,"slug":17,"jsonld":18},"Defauts courants de fabrication PCB et comment les eviter : guide pratique, specifications et depannage","Guide pratique sur les defauts courants de fabrication PCB et leur prevention : regles claires, parametres recommandes, verifications de fabrication et corrections typiques.","2026-01-08","technology","/assets/img/pcb/common/pcb-validation-mechanical.webp",8,1561,"PT8M","\u003Ch3 id=\"sommaire\" data-anchor-en=\"contents\">Sommaire\u003C/h3>\n\u003Cul>\n\u003Cli>\u003Ca href=\"#points-cles\">Points cles\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#definition-et-perimetre\">Definition et perimetre\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#regles-et-specifications\">Regles et specifications\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#etapes-de-mise-en-oeuvre\">Etapes de mise en oeuvre\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#depannage\">Depannage\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#checklist-fournisseur\">Checklist fournisseur\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#glossaire\">Glossaire\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#6-regles-essentielles\">6 regles essentielles\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#faq\">FAQ\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#demander-un-devis--une-revue-dfm\">Demander un devis / une revue DFM\u003C/a>\u003C/li>\n\u003Cli>\u003Ca href=\"#conclusion\">Conclusion\u003C/a>\u003C/li>\n\u003C/ul>\n\u003Cp>Dans le monde critique du hardware electronique, \u003Cstrong>defauts courants de fabrication PCB et comment les eviter\u003C/strong> n'est pas qu'une requete de recherche. C'est souvent la difference entre un lancement reussi et un rappel couteux. Les defauts de fabrication sont des imperfections physiques introduites pendant la fabrication ou l'assemblage. Une partie vient des variations de process, mais la majorite part de fichiers de conception qui poussent les tolerances sans marge suffisante.\u003C/p>\n\u003Cp>En tant que Senior CAM Engineer chez APTPCB, je retrouve les memes problemes chaque semaine : acid traps, annular rings insuffisants, cuivre desequilibre et warpage. Ce guide relie le logiciel CAD a la realite de l'atelier et propose des regles concretes pour rendre vos designs plus robustes.\u003C/p>\n\u003Ch2 id=\"reponse-rapide\" data-anchor-en=\"quick-answer\">Reponse rapide\u003C/h2>\n\u003Cp>Pour maitriser \u003Cstrong>defauts courants de fabrication PCB et comment les eviter\u003C/strong>, il faut imposer des limites DFM strictes :\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>Annular Ring\u003C/strong> : minimum \u003Cstrong>0,15 mm\u003C/strong> pour les vias standard.\u003C/li>\n\u003Cli>\u003Cstrong>Trace/Space\u003C/strong> : garder au moins \u003Cstrong>0,1 mm / 0,1 mm\u003C/strong> avec cuivre 1 oz.\u003C/li>\n\u003Cli>\u003Cstrong>Aspect Ratio\u003C/strong> : rester sous \u003Cstrong>8:1\u003C/strong>.\u003C/li>\n\u003Cli>\u003Cstrong>Solder Mask Dam\u003C/strong> : minimum \u003Cstrong>0,1 mm\u003C/strong> entre pads.\u003C/li>\n\u003Cli>\u003Cstrong>Equilibrage cuivre\u003C/strong> : repartir le cuivre regulierement sur les couches et selon X/Y.\u003C/li>\n\u003C/ul>\n\u003Ch2 id=\"points-cles\" data-anchor-en=\"highlights\">Points cles\u003C/h2>\n\u003Cul>\n\u003Cli>\u003Cstrong>Le DFM proactif coute moins cher\u003C/strong>.\u003C/li>\n\u003Cli>\u003Cstrong>La physique impose les tolerances\u003C/strong>.\u003C/li>\n\u003Cli>\u003Cstrong>Le materiau compte reellement\u003C/strong>.\u003C/li>\n\u003Cli>\u003Cstrong>La clarte des donnees est decisive\u003C/strong>.\u003C/li>\n\u003C/ul>\n\u003Chr>\n\u003Ch2 id=\"definition-et-perimetre\" data-anchor-en=\"common-pcb-manufacturing-defects-and-how-to-avoid-definition-and-scope\">Definition et perimetre\u003C/h2>\n\u003Cp>Comprendre \u003Cstrong>defauts courants de fabrication PCB et comment les eviter\u003C/strong> impose de distinguer erreur de conception et defaut de fabrication. Le defaut de fabrication apparait lorsque la carte physique ne respecte plus la specification IPC ou l'intention de design a cause des limites du process.\u003C/p>\n\u003Cp>Le perimetre couvre trois phases :\u003C/p>\n\u003Col>\n\u003Cli>\u003Cstrong>Fabrication\u003C/strong> : acid traps, surgravure, plating voids, breakout.\u003C/li>\n\u003Cli>\u003Cstrong>Lamination\u003C/strong> : delamination, blistering, measling.\u003C/li>\n\u003Cli>\u003Cstrong>Assemblage\u003C/strong> : solder bridging, tombstoning, poor wetting.\u003C/li>\n\u003C/ol>\n\u003Cp>Chez APTPCB, nous insistons sur le fait que la prevention est partagee. Le designer doit fournir un layout robuste, et le fabricant doit tenir son process. Les \u003Cstrong>\u003Ca href=\"/fr/pcb/pcb-quality\">PCB Quality Systems\u003C/a>\u003C/strong> et l'AOI detectent les defauts de surface, mais ils ne corrigent pas un design qui piege l'acide dans des angles aigus.\u003C/p>\n\u003Cdiv style=\"background-color:#F5F7FA;padding:18px;border-radius:10px;margin:20px 0;\">\n    \u003Ch3 style=\"margin:0 0 12px 0;color:#000000;\" id=\"levier-technique-impact-pratique\" data-anchor-en=\"common-pcb-manufacturing-defects-and-how-to-avoid-rules-and-specifications\">Levier technique → impact pratique\u003C/h3>\n    \u003Ctable style=\"width:100%;border-collapse:collapse;text-align:left;color:#000000;\">\n        \u003Cthead style=\"background-color:#D1E7D1; color:#000000;\">\n            \u003Ctr>\n                \u003Cth style=\"padding:10px;border:1px solid #ccc;\">Levier / specification\u003C/th>\n                \u003Cth style=\"padding:10px;border:1px solid #ccc;\">Impact pratique\u003C/th>\n            \u003C/tr>\n        \u003C/thead>\n        \u003Ctbody>\n            \u003Ctr>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc; font-weight:bold;\">Geometrie de piste angle aigu\u003C/td>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc;\">Piege l'acide et attaque le cuivre. \u003Cstrong>Impact : open circuits.\u003C/strong>\u003C/td>\n            \u003C/tr>\n            \u003Ctr>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc; font-weight:bold;\">Aspect ratio de perçage >10:1\u003C/td>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc;\">La chimie de plating circule mal. \u003Cstrong>Impact : plating voids et connexions intermittentes.\u003C/strong>\u003C/td>\n            \u003C/tr>\n            \u003Ctr>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc; font-weight:bold;\">Solder mask dam \u003C3 mil\u003C/td>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc;\">Le masque n'adhere pas bien. \u003Cstrong>Impact : ponts de soudure et courts-circuits.\u003C/strong>\u003C/td>\n            \u003C/tr>\n            \u003Ctr>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc; font-weight:bold;\">Repartition cuivre desequilibree\u003C/td>\n                \u003Ctd style=\"padding:10px;border:1px solid #ccc;\">Cree du warpage. \u003Cstrong>Impact : Bow & Twist et echec d'assemblage.\u003C/strong>\u003C/td>\n            \u003C/tr>\n        \u003C/tbody>\n    \u003C/table>\n\u003C/div>\n\n\u003Ch2 id=\"regles-et-specifications\" data-anchor-en=\"common-pcb-manufacturing-defects-and-how-to-avoid-implementation-steps\">Regles et specifications\u003C/h2>\n\u003Ctable>\n\u003Cthead>\n\u003Ctr>\n\u003Cth align=\"left\">Regle\u003C/th>\n\u003Cth align=\"left\">Valeur recommandee\u003C/th>\n\u003Cth align=\"left\">Pourquoi c'est important\u003C/th>\n\u003Cth align=\"left\">Comment verifier\u003C/th>\n\u003C/tr>\n\u003C/thead>\n\u003Ctbody>\u003Ctr>\n\u003Ctd align=\"left\">\u003Cstrong>Annular Ring mini\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">\u003Cstrong>0,15 mm\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">Compense la derive de foret et les deplacements de couches.\u003C/td>\n\u003Ctd align=\"left\">CAM simulation / IPC-6012\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd align=\"left\">\u003Cstrong>Trace/Space mini\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">\u003Cstrong>0,1 mm / 0,1 mm\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">Evite shorts et opens.\u003C/td>\n\u003Ctd align=\"left\">DRC CAD\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd align=\"left\">\u003Cstrong>Solder Mask Expansion\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">\u003Cstrong>0,05 mm - 0,075 mm\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">Evite l'empiement du masque sur le pad.\u003C/td>\n\u003Ctd align=\"left\">Superposition Gerber\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd align=\"left\">\u003Cstrong>Drill-to-Copper\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">\u003Cstrong>0,2 mm\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">Evite de toucher des traces internes.\u003C/td>\n\u003Ctd align=\"left\">DFM / verif netlist\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd align=\"left\">\u003Cstrong>Thermal Relief\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">\u003Cstrong>4 branches\u003C/strong>\u003C/td>\n\u003Ctd align=\"left\">Evite les cold solder joints.\u003C/td>\n\u003Ctd align=\"left\">Inspection visuelle\u003C/td>\n\u003C/tr>\n\u003C/tbody>\u003C/table>\n\u003Cp>\u003Cimg src=\"/assets/img/pcb/common/pcb-process-trace-width-spacing.webp\" alt=\"Validation largeur et espacement\">\u003C/p>\n\u003Ch2 id=\"etapes-de-mise-en-oeuvre\" data-anchor-en=\"common-pcb-manufacturing-defects-and-how-to-avoid-troubleshooting\">Etapes de mise en oeuvre\u003C/h2>\n\u003Cp>Un workflow sans defaut demande plus qu'une checklist. Les \u003Cstrong>\u003Ca href=\"/fr/resources/dfm-guidelines\">DFM Guidelines\u003C/a>\u003C/strong> doivent etre integrees a chaque etape.\u003C/p>\n\u003Ch3 id=\"1-definir-le-stackup-avant-layout\" data-anchor-en=\"1-acid-traps-open-circuits\">1. Definir le stackup avant layout\u003C/h3>\n\u003Cp>Fixer l'empilage et les contraintes d'impedance avant le routage.\u003C/p>\n\u003Ch3 id=\"2-configurer-un-drc-temps-reel\" data-anchor-en=\"2-plating-voids-intermittent-connections\">2. Configurer un DRC temps reel\u003C/h3>\n\u003Cp>Entrer les vraies limites de fabrication du fournisseur dans le CAD.\u003C/p>\n\u003Ch3 id=\"3-faire-une-revue-dfm-apres-layout\" data-anchor-en=\"3-solder-mask-slivers\">3. Faire une revue DFM apres layout\u003C/h3>\n\u003Cp>Exporter les Gerbers et verifier acid traps, slivers et mask bridges dans un viewer externe.\u003C/p>\n\u003Ch3 id=\"4-valider-par-prototype\" data-anchor-en=\"4-black-pad-enig-surface-finish\">4. Valider par prototype\u003C/h3>\n\u003Cp>Commander une petite serie et demander un rapport FAI avec dimensions et microsections.\u003C/p>\n\u003Ch2 id=\"depannage\" data-anchor-en=\"supplier-qualification-checklist-how-to-vet-your-fab\">Depannage\u003C/h2>\n\u003Ch3 id=\"1-acid-traps\" data-anchor-en=\"glossary\">1. Acid Traps\u003C/h3>\n\u003Cul>\n\u003Cli>\u003Cstrong>Symptome\u003C/strong> : pistes "mangees" ou coupees a des coins vifs.\u003C/li>\n\u003Cli>\u003Cstrong>Cause\u003C/strong> : angles aigus qui retiennent l'acide.\u003C/li>\n\u003Cli>\u003Cstrong>Correction\u003C/strong> : router a 45° ou 90° et utiliser des teardrops.\u003C/li>\n\u003C/ul>\n\u003Ch3 id=\"2-plating-voids\" data-anchor-en=\"6-essential-rules-for-common-pcb-manufacturing-defects-and-how-to-avoid-cheat-sheet\">2. Plating Voids\u003C/h3>\n\u003Cul>\n\u003Cli>\u003Cstrong>Symptome\u003C/strong> : vias en echec de continuite ou instables sous chaleur.\u003C/li>\n\u003Cli>\u003Cstrong>Cause\u003C/strong> : bulles d'air, nettoyage insuffisant, aspect ratio trop eleve.\u003C/li>\n\u003Cli>\u003Cstrong>Correction\u003C/strong> : reduire l'aspect ratio et exiger un bon desmear. Voir \u003Cstrong>\u003Ca href=\"/fr/pcb/pcb-drilling\">PCB Drilling\u003C/a>\u003C/strong>.\u003C/li>\n\u003C/ul>\n\u003Ch3 id=\"3-solder-mask-slivers\" data-anchor-en=\"faq\">3. Solder Mask Slivers\u003C/h3>\n\u003Cul>\n\u003Cli>\u003Cstrong>Symptome\u003C/strong> : fines bandes de masque qui se decollent.\u003C/li>\n\u003Cli>\u003Cstrong>Cause\u003C/strong> : webs de masque trop etroits.\u003C/li>\n\u003Cli>\u003Cstrong>Correction\u003C/strong> : en dessous de 3 mil, preferer un gang relief.\u003C/li>\n\u003C/ul>\n\u003Ch3 id=\"4-black-pad\" data-anchor-en=\"request-a-quote-dfm-review-for-common-pcb-manufacturing-defects-and-how-to-avoid\">4. Black Pad\u003C/h3>\n\u003Cul>\n\u003Cli>\u003Cstrong>Symptome\u003C/strong> : joints fragiles, nickel noirci.\u003C/li>\n\u003Cli>\u003Cstrong>Cause\u003C/strong> : hyper-corrosion du nickel en ENIG.\u003C/li>\n\u003Cli>\u003Cstrong>Correction\u003C/strong> : mieux controler le bain or ou passer a d'autres \u003Cstrong>\u003Ca href=\"/fr/pcb/pcb-surface-finishes\">PCB Surface Finishes\u003C/a>\u003C/strong>.\u003C/li>\n\u003C/ul>\n\u003Ch2 id=\"checklist-fournisseur\" data-anchor-en=\"conclusion\">Checklist fournisseur\u003C/h2>\n\u003Cul>\n\u003Cli>\u003Cinput disabled=\"\" type=\"checkbox\"> \u003Cstrong>Faites-vous de l'AOI sur toutes les couches internes ?\u003C/strong>\u003C/li>\n\u003Cli>\u003Cinput disabled=\"\" type=\"checkbox\"> \u003Cstrong>Quel annular ring minimum acceptez-vous en Class 2 et 3 ?\u003C/strong>\u003C/li>\n\u003Cli>\u003Cinput disabled=\"\" type=\"checkbox\"> \u003Cstrong>Realisez-vous des microsections a chaque lot ?\u003C/strong>\u003C/li>\n\u003Cli>\u003Cinput disabled=\"\" type=\"checkbox\"> \u003Cstrong>Quel est votre aspect ratio max en perçage mecanique ?\u003C/strong>\u003C/li>\n\u003Cli>\u003Cinput disabled=\"\" type=\"checkbox\"> \u003Cstrong>Votre CAM verifie-t-il les acid traps ?\u003C/strong>\u003C/li>\n\u003Cli>\u003Cinput disabled=\"\" type=\"checkbox\"> \u003Cstrong>Pouvez-vous fournir des rapports TDR ?\u003C/strong>\u003C/li>\n\u003Cli>\u003Cinput disabled=\"\" type=\"checkbox\"> \u003Cstrong>Quelle tolerance de Bow & Twist garantissez-vous ?\u003C/strong>\u003C/li>\n\u003C/ul>\n\u003Ch2 id=\"glossaire\">Glossaire\u003C/h2>\n\u003Cp>\u003Cstrong>Annular Ring\u003C/strong> : anneau de cuivre autour d'un trou perce.\u003C/p>\n\u003Cp>\u003Cstrong>Aspect Ratio\u003C/strong> : rapport entre epaisseur de carte et diametre du trou.\u003C/p>\n\u003Cp>\u003Cstrong>Acid Trap\u003C/strong> : geometrie qui retient l'etchant.\u003C/p>\n\u003Cp>\u003Cstrong>Bow and Twist\u003C/strong> : deviation de la carte par rapport a la planeite.\u003C/p>\n\u003Cp>\u003Cstrong>Delamination\u003C/strong> : separation des couches de la PCB.\u003C/p>\n\u003Ch2 id=\"6-regles-essentielles\">6 regles essentielles\u003C/h2>\n\u003Cdiv style=\"background-color:#F5F7F5; padding:20px; border-radius:8px; margin-top:20px; box-shadow: 0 2px 4px rgba(0,0,0,0.05);\">\n\u003Ctable style=\"width:100%; border-collapse:collapse; text-align:left; font-family:sans-serif; color:#333333;\">\n\u003Cthead style=\"background-color:#E0E8E0; color:#2E7D32;\">\n\u003Ctr>\n\u003Cth style=\"padding:12px; border-bottom:2px solid #A5D6A7;\">Regle\u003C/th>\n\u003Cth style=\"padding:12px; border-bottom:2px solid #A5D6A7;\">Pourquoi importante\u003C/th>\n\u003Cth style=\"padding:12px; border-bottom:2px solid #A5D6A7;\">Valeur cible / action\u003C/th>\n\u003C/tr>\n\u003C/thead>\n\u003Ctbody>\n\u003Ctr>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Annular Ring mini\u003C/strong>\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">Le foret derive, un ring trop faible produit du breakout.\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>≥ 6 mil\u003C/strong>\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Trace/Space\u003C/strong>\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">Evite shorts et opens.\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>≥ 4 mil\u003C/strong>\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Solder Mask Dam\u003C/strong>\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">Evite le pont de soudure sur pas fin.\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>≥ 4 mil\u003C/strong>\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Aspect Ratio\u003C/strong>\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">Assure une metallisation fiable du trou.\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>≤ 8:1\u003C/strong>\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Equilibre cuivre\u003C/strong>\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">Evite Bow & Twist au reflow.\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Distribution uniforme\u003C/strong>\u003C/td>\n\u003C/tr>\n\u003Ctr>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Suppression des angles aigus\u003C/strong>\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">Evite les acid traps.\u003C/td>\n\u003Ctd style=\"padding:10px; border-bottom:1px solid #eee;\">\u003Cstrong>Aucun angle < 90°\u003C/strong>\u003C/td>\n\u003C/tr>\n\u003C/tbody>\n\u003C/table>\n\u003Cdiv style=\"margin-top:10px; font-size:0.9em; color:#666; text-align:right;\">\n\u003Cem>Conservez ce tableau dans votre checklist de design review.\u003C/em>\n\u003C/div>\n\u003C/div>\n\n\u003Ch2 id=\"faq\">FAQ\u003C/h2>\n\u003Cp>\u003Cstrong>Q: Quelle est la cause la plus frequente de delamination ?\u003C/strong>\u003C/p>\n\u003Cp>A: Le plus souvent, de l'humidite piegee dans la carte se dilate au reflow. Une mauvaise adhesion inter-couches peut aussi etre en cause.\u003C/p>\n\u003Cp>\u003Cstrong>Q: Comment eviter le tombstoning ?\u003C/strong>\u003C/p>\n\u003Cp>A: Utiliser des pads symetriques et des thermal reliefs sur les grandes zones cuivre.\u003C/p>\n\u003Cp>\u003Cstrong>Q: Pourquoi drill wander est-il si critique en DFM ?\u003C/strong>\u003C/p>\n\u003Cp>A: Les forets mecaniques flechissent dans le FR4. Sans annular ring suffisant, cela produit du breakout.\u003C/p>\n\u003Cp>\u003Cstrong>Q: Puis-je utiliser des angles de piste a 90° ?\u003C/strong>\u003C/p>\n\u003Cp>A: 45° reste preferable, mais 90° est generalement acceptable sur signaux lents si la piste est assez large.\u003C/p>\n\u003Cp>\u003Cstrong>Q: Quelle difference entre short et open ?\u003C/strong>\u003C/p>\n\u003Cp>A: Un short est une connexion non voulue. Un open est une coupure d'une connexion qui devrait exister.\u003C/p>\n\u003Cp>\u003Cstrong>Q: Comment le poids cuivre affecte-t-il les defauts ?\u003C/strong>\u003C/p>\n\u003Cp>A: Un cuivre plus epais demande plus de temps d'attaque, augmente l'undercut et impose plus d'espacement.\u003C/p>\n\u003Ch2 id=\"demander-un-devis-une-revue-dfm\">Demander un devis / une revue DFM\u003C/h2>\n\u003Cdiv data-component=\"BlogQuickQuoteInline\">\u003C/div>\n\n\u003Cp>Pret a lancer votre design en production avec zero defaut ? Chez APTPCB, nos ingenieurs CAM effectuent une revue DFM complete sur chaque dossier avant fabrication.\u003C/p>\n\u003Cp>\u003Cstrong>Pour commencer, preparez :\u003C/strong>\u003C/p>\n\u003Cul>\n\u003Cli>\u003Cstrong>Gerber Files\u003C/strong> : format RS-274X ou X2.\u003C/li>\n\u003Cli>\u003Cstrong>Drill File\u003C/strong> : format Excellon avec liste d'outils.\u003C/li>\n\u003Cli>\u003Cstrong>Stackup Diagram\u003C/strong> : ordre des couches, poids cuivre et epaisseurs dielectriques.\u003C/li>\n\u003Cli>\u003Cstrong>ReadMe\u003C/strong> : contraintes speciales comme impedance control ou gold fingers.\u003C/li>\n\u003C/ul>\n\u003Ch2 id=\"conclusion\">Conclusion\u003C/h2>\n\u003Cp>Maitriser \u003Cstrong>les defauts courants de fabrication PCB et comment les eviter\u003C/strong> revient a respecter la physique du process. En gardant des annular rings robustes, un cuivre equilibre et des aspect ratios raisonnables, vous transformez un design a risque en produit a haut yield. La qualite ne se controle pas seulement a la fin, elle se conçoit.\u003C/p>\n\u003Cp>Signe, l'equipe d'ingenierie APTPCB\u003C/p>\n\n\u003Csection class=\"related-links\" aria-label=\"Related\">\u003Ch3>Related links\u003C/h3>\u003Cul>\u003Cli>\u003Ca href=\"/fr/pcb/pcb-quality\">PCB Quality Systems\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/fr/resources/dfm-guidelines\">DFM Guidelines\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/fr/pcb/pcb-drilling\">PCB Drilling\u003C/a>\u003C/li>\u003Cli>\u003Ca href=\"/fr/pcb/pcb-surface-finishes\">PCB Surface Finishes\u003C/a>\u003C/li>\u003C/ul>\u003C/section>",[14,15,16],"defauts courants de fabrication PCB et comment les eviter","regles d'annular ring et tolerance de perçage pour PCB","directives DFM pour layout PCB","common-pcb-manufacturing-defects-and-how-to-avoid",{"blog":19,"breadcrumb":28,"faq":42},{"@context":20,"@type":21,"headline":4,"description":5,"image":8,"url":22,"datePublished":6,"dateModified":6,"timeRequired":11,"keywords":23,"articleSection":7,"author":24,"publisher":27},"https://schema.org","BlogPosting","https://aptpcb.com/fr/blog/common-pcb-manufacturing-defects-and-how-to-avoid","defauts courants de fabrication PCB et comment les eviter, regles d'annular ring et tolerance de perçage pour PCB, directives DFM pour layout PCB",{"@type":25,"name":26},"Organization","APTPCB",{"@type":25,"name":26},{"@context":20,"@type":29,"itemListElement":30},"BreadcrumbList",[31,36,40],{"@type":32,"position":33,"name":34,"item":35},"ListItem",1,"Home","https://aptpcb.com/",{"@type":32,"position":37,"name":38,"item":39},2,"Blog","https://aptpcb.com/fr/blog",{"@type":32,"position":41,"name":17,"item":22},3,{"@context":20,"@type":43,"mainEntity":44},"FAQPage",[45,51,55,59,63,67],{"@type":46,"name":47,"acceptedAnswer":48},"Question","Quelle est la cause la plus frequente de delamination ?",{"@type":49,"text":50},"Answer","Le plus souvent, de l'humidite piegee dans la carte se dilate au reflow. Une mauvaise adhesion inter-couches peut aussi etre en cause.",{"@type":46,"name":52,"acceptedAnswer":53},"Comment eviter le tombstoning ?",{"@type":49,"text":54},"Utiliser des pads symetriques et des thermal reliefs sur les grandes zones cuivre.",{"@type":46,"name":56,"acceptedAnswer":57},"Pourquoi drill wander est-il si critique en DFM ?",{"@type":49,"text":58},"Les forets mecaniques flechissent dans le FR4. Sans annular ring suffisant, cela produit du breakout.",{"@type":46,"name":60,"acceptedAnswer":61},"Puis-je utiliser des angles de piste a 90° ?",{"@type":49,"text":62},"45° reste preferable, mais 90° est generalement acceptable sur signaux lents si la piste est assez large.",{"@type":46,"name":64,"acceptedAnswer":65},"Quelle difference entre short et open ?",{"@type":49,"text":66},"Un short est une connexion non voulue. Un open est une coupure d'une connexion qui devrait exister.",{"@type":46,"name":68,"acceptedAnswer":69},"Comment le poids cuivre affecte-t-il les defauts ?",{"@type":49,"text":70},"Un cuivre plus epais demande plus de temps d'attaque, augmente l'undercut et impose plus d'espacement.",{"pcbManufacturingColumns":72,"capabilityColumns":196,"resourceColumns":227,"pcbaColumns":267},[73,121,150,179],{"heading":74,"links":75},"Familles de produits PCB",[76,79,82,85,88,91,94,97,100,103,106,109,112,115,118],{"label":77,"path":78},"PCB FR-4","/pcb/fr4-pcb",{"label":80,"path":81},"PCB haute vitesse","/pcb/high-speed-pcb",{"label":83,"path":84},"PCB multicouches","/pcb/multilayer-pcb",{"label":86,"path":87},"PCB HDI","/pcb/hdi-pcb",{"label":89,"path":90},"PCB flexible","/pcb/flex-pcb",{"label":92,"path":93},"PCB rigid-flex","/pcb/rigid-flex-pcb",{"label":95,"path":96},"PCB céramique","/pcb/ceramic-pcb",{"label":98,"path":99},"PCB cuivre épais","/pcb/heavy-copper-pcb",{"label":101,"path":102},"PCB 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