{"id":3485,"date":"2025-06-30T08:30:00","date_gmt":"2025-06-30T00:30:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=3485"},"modified":"2025-06-26T16:10:19","modified_gmt":"2025-06-26T08:10:19","slug":"how-to-design-impedance-control-for-pcb","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/fr\/blog\/how-to-design-impedance-control-for-pcb\/","title":{"rendered":"Comment concevoir un contr\u00f4le d'imp\u00e9dance pour un circuit imprim\u00e9 ?"},"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\/how-to-design-impedance-control-for-pcb\/#The_Importance_of_PCB_Impedance_Control\" >L'importance du contr\u00f4le de l'imp\u00e9dance des circuits imprim\u00e9s<\/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\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#The_Four_Pillars_of_Impedance_Control\" >Les quatre piliers du contr\u00f4le de l'imp\u00e9dance<\/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\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#1_Material_Selection\" >1. S\u00e9lection des mat\u00e9riaux<\/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\/how-to-design-impedance-control-for-pcb\/#2_Laminated_design\" >2.Conception stratifi\u00e9e<\/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\/how-to-design-impedance-control-for-pcb\/#3_Wiring_design\" >3.Conception du c\u00e2blage<\/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\/how-to-design-impedance-control-for-pcb\/#4_Manufacturing_Process\" >4.Processus de fabrication<\/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\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#Common_Impedance_Control_Issues_Solutions\" >Probl\u00e8mes courants de contr\u00f4le de l'imp\u00e9dance et solutions<\/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\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#Issue_1_Via-Induced_Impedance_Discontinuity\" >Question 1 : Discontinuit\u00e9 d'imp\u00e9dance induite par les vias<\/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\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#Issue_2_Connector_Transition_Zone_Impedance_Mismatch\" >Probl\u00e8me 2 : D\u00e9sadaptation de l'imp\u00e9dance de la zone de transition du connecteur<\/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\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#Issue_3_Board_Edge_Radiation_Causing_Impedance_Fluctuation\" >Probl\u00e8me 3 : Rayonnement des bords de la carte provoquant une fluctuation de l'imp\u00e9dance<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#Case_Study_10Gbps_SerDes_Channel_Impedance_Optimization\" >\u00c9tude de cas : Optimisation de l'imp\u00e9dance du canal SerDes \u00e0 10 Gbps<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#Emerging_Technologies\" >Technologies \u00e9mergentes<\/a><\/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\/fr\/blog\/how-to-design-impedance-control-for-pcb\/#Engineers_Checklist\" >Liste de contr\u00f4le de l'ing\u00e9nieur<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Importance_of_PCB_Impedance_Control\"><\/span>L'importance du contr\u00f4le de l'imp\u00e9dance des circuits imprim\u00e9s<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Dans les appareils \u00e9lectroniques \u00e0 grande vitesse d&amp;#8217aujourd&amp;#8217hui, les vitesses de transmission des signaux sont de plus en plus rapides, et le contr\u00f4le de l&amp;#8217imp\u00e9dance des circuits imprim\u00e9s est devenu un facteur cl\u00e9 pour d\u00e9terminer le succ\u00e8s ou l&amp;#8217\u00e9chec d&amp;#8217une conception. Une mauvaise adaptation de l'imp\u00e9dance peut entra\u00eener des probl\u00e8mes de r\u00e9flexion du signal, de sonnerie et de d\u00e9passement, ce qui affecte s\u00e9rieusement l'int\u00e9grit\u00e9 du signal. Selon les statistiques, plus de 60 % des d\u00e9faillances des circuits num\u00e9riques \u00e0 grande vitesse sont li\u00e9es \u00e0 un mauvais contr\u00f4le de l'imp\u00e9dance. Il est donc essentiel de ma\u00eetriser la technologie de contr\u00f4le de l'imp\u00e9dance des circuits imprim\u00e9s.<\/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\/impedance-control-2.jpg\" alt=\"contr\u00f4le de l&#039;imp\u00e9dance\" class=\"wp-image-3487\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"The_Four_Pillars_of_Impedance_Control\"><\/span>Les quatre piliers du contr\u00f4le de l'imp\u00e9dance<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Material_Selection\"><\/span>1. S\u00e9lection des mat\u00e9riaux<span class=\"ez-toc-section-end\"><\/span><\/h3><p><em>&#8220;Choisissez le bon mat\u00e9riel et vous serez \u00e0 mi-chemin du succ\u00e8s &#8220;&#8220;&#8220;&#8220;&#8220;&#8220;&amp;#8221 ;<\/em>-Ceci est particuli\u00e8rement vrai pour le contr\u00f4le de l'imp\u00e9dance :<\/p><ul class=\"wp-block-list\"><li><strong>Mat\u00e9riaux recommand\u00e9s pour les hautes fr\u00e9quences<\/strong>: Rogers RO4350B (\u03b5r=3,48), Isola I-Tera MT40 (\u03b5r=3,45), et d'autres mat\u00e9riaux \u00e0 faible perte sont des choix id\u00e9aux.<\/li>\n\n<li><strong>Limites du FR4 traditionnel<\/strong>: Les fluctuations importantes de la constante di\u00e9lectrique (4,2-4,7) et la tangente de perte \u00e9lev\u00e9e (0,02) ne conviennent pas aux applications sup\u00e9rieures \u00e0 10 GHz.<\/li>\n\n<li><strong>S\u00e9lection de feuilles de cuivre<\/strong>: La feuille de cuivre \u00e0 profil bas (LP foil) r\u00e9duit la rugosit\u00e9 de la surface de 30 % par rapport \u00e0 une feuille standard, ce qui r\u00e9duit consid\u00e9rablement les pertes \u00e0 haute fr\u00e9quence.<\/li><\/ul><p><strong>Conseil d'expert<\/strong>: Pour les fr\u00e9quences d'ondes millim\u00e9triques (24 GHz et plus), envisagez des mat\u00e9riaux \u00e0 tr\u00e8s faible perte comme le RT\/duro\u00efde 5880 de Rogers (\u03b5r=2,2).<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Laminated_design\"><\/span>2.Conception stratifi\u00e9e<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Une excellente conception de l'empilage doit prendre en compte les \u00e9l\u00e9ments suivants<\/p><ul class=\"wp-block-list\"><li><strong>Structure sym\u00e9trique<\/strong>: Emp\u00eache le gauchissement de la carte, comme une disposition sym\u00e9trique \"signal-masse-signal\".<\/li>\n\n<li><strong>\u00c9paisseur de la couche interm\u00e9diaire<\/strong>: Valeurs typiques recommand\u00e9es :<\/li>\n\n<li>Couche superficielle simple 50\u03a9 :\u00c9paisseur di\u00e9lectrique de 5-6 millim\u00e8tres (largeur de trace 8-10 millim\u00e8tres).<\/li>\n\n<li>Couche int\u00e9rieure simple 50\u03a9 :\u00c9paisseur du di\u00e9lectrique de 4 \u00e0 5 millim\u00e8tres (largeur de la trace 5 \u00e0 7 millim\u00e8tres).<\/li>\n\n<li><strong>Plans de r\u00e9f\u00e9rence<\/strong>: Veiller \u00e0 ce que les couches de signaux soient adjacentes \u00e0 des plans de masse complets, en \u00e9vitant les s\u00e9parations.<\/li><\/ul><p><strong>\u00c9tude de cas<\/strong>Une carte \u00e0 6 couches optimis\u00e9e pour l'empilage am\u00e9liore l'int\u00e9grit\u00e9 du signal de 40 % :<\/p><pre class=\"wp-block-code\"><code>Couche 1 :Signal (microruban) \nCouche 2 : Plan de masse solide \nCouche 3 : Signal (stripline) \nCouche 4 : Signal (stripline) \nCouche 5 : Plan de masse solide \nCouche 6 : Signal (microstrip)  <\/code><\/pre><p><strong><a href=\"https:\/\/www.topfastpcb.com\/fr\/contact\/\">Consulter un professionnel de la conception de circuits imprim\u00e9s<\/a>La conception scientifique de l'empilement des couches garantit la fiabilit\u00e9 des circuits imprim\u00e9s.<\/strong><\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Wiring_design\"><\/span>3.Conception du c\u00e2blage<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Formule d'imp\u00e9dance<\/strong> (approximation microruban) :<\/p><p>Z\u2080 \u2248 (87\/\u221a(\u03b5r+1.41)) \u00d7 ln(5.98h\/(0.8w+t))<\/p><p>O\u00f9 ?<\/p><ul class=\"wp-block-list\"><li>Z\u2080 : Imp\u00e9dance caract\u00e9ristique (\u03a9)<\/li>\n\n<li>\u03b5r :Constante di\u00e9lectrique relative<\/li>\n\n<li>h :\u00c9paisseur du di\u00e9lectrique (mil)<\/li>\n\n<li>w :Largeur de la trace (mil)<\/li>\n\n<li>t :Epaisseur du cuivre (mil)<\/li><\/ul><p><strong>Conseils pratiques<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Utilisez les calculateurs d'imp\u00e9dance Polar Si9000 ou Altium pour des calculs pr\u00e9cis.<\/li>\n\n<li>Suivre la r\u00e8gle des 3W pour les paires diff\u00e9rentielles : Espacement \u2265 3\u00d7 la largeur de la trace.<\/li>\n\n<li>Correspondre aux longueurs de signaux critiques avec une tol\u00e9rance de \u00b15mil.<\/li><\/ul><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\/impedance-control-3.jpg\" alt=\"contr\u00f4le de l&#039;imp\u00e9dance\" class=\"wp-image-3488\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-3.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-3-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-3-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Manufacturing_Process\"><\/span>4.Processus de fabrication<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Lors de la collaboration avec <a href=\"https:\/\/www.topfastpcb.com\/fr\/\">Fabricants de circuits imprim\u00e9s<\/a>, confirmer :<\/p><ul class=\"wp-block-list\"><li><strong>Tol\u00e9rance d'imp\u00e9dance<\/strong>: G\u00e9n\u00e9ralement \u00b110%, \u00b17% pour les applications haut de gamme.<\/li>\n\n<li><strong>\u00c9paisseur du cuivre fini<\/strong>: Cuivre 1oz \u2248 1,4mil (35\u03bcm) d'\u00e9paisseur r\u00e9elle.<\/li>\n\n<li><strong>Variation de l'\u00e9paisseur di\u00e9lectrique<\/strong>: G\u00e9n\u00e9ralement \u00e0 \u00b110%.<\/li>\n\n<li><strong>Finition de la surface<\/strong>ENIG est meilleur que HASL pour les applications \u00e0 haute fr\u00e9quence.<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Impedance_Control_Issues_Solutions\"><\/span>Probl\u00e8mes courants de contr\u00f4le de l'imp\u00e9dance et solutions<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Issue_1_Via-Induced_Impedance_Discontinuity\"><\/span>Question 1 : Discontinuit\u00e9 d'imp\u00e9dance induite par les vias<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Solutions<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Utiliser le per\u00e7age arri\u00e8re pour \u00e9liminer l'exc\u00e8s d'embouts.<\/li>\n\n<li>Ajouter des vias de masse pr\u00e8s des vias de signaux critiques (espacement &lt;150mil).<\/li>\n\n<li>Utiliser des microvias (&lt;6mil) pour r\u00e9duire les effets parasites.<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Issue_2_Connector_Transition_Zone_Impedance_Mismatch\"><\/span>Probl\u00e8me 2 : D\u00e9sadaptation de l'imp\u00e9dance de la zone de transition du connecteur<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Solutions<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Concevoir des trac\u00e9s coniques pour des transitions d'imp\u00e9dance en douceur.<\/li>\n\n<li>Utiliser des structures de guides d'ondes coplanaires pour am\u00e9liorer la continuit\u00e9 de la terre.<\/li>\n\n<li>Choisir des connecteurs \u00e0 imp\u00e9dance adapt\u00e9e (par exemple, s\u00e9rie Samtec SEARAY).<\/li><\/ul><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Issue_3_Board_Edge_Radiation_Causing_Impedance_Fluctuation\"><\/span>Probl\u00e8me 3 : Rayonnement des bords de la carte provoquant une fluctuation de l'imp\u00e9dance<span class=\"ez-toc-section-end\"><\/span><\/h3><p><strong>Solutions<\/strong>:<\/p><ul class=\"wp-block-list\"><li>Appliquer la r\u00e8gle &#8220;20H&#8221; : Le plan de puissance est ins\u00e9r\u00e9 par 20\u00d7 l'\u00e9paisseur du di\u00e9lectrique.<\/li>\n\n<li>Ajouter des r\u00e9seaux de sol le long des bords (espacement &lt;\u03bb\/10).<\/li>\n\n<li>Appliquer des structures \u00e0 bande interdite \u00e9lectromagn\u00e9tique (EBG) pour supprimer le rayonnement de bord.<\/li><\/ul><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Case_Study_10Gbps_SerDes_Channel_Impedance_Optimization\"><\/span>\u00c9tude de cas : Optimisation de l'imp\u00e9dance du canal SerDes \u00e0 10 Gbps<span class=\"ez-toc-section-end\"><\/span><\/h2><p><strong>D\u00e9fi<\/strong>: Une carte de circuit imprim\u00e9 de commutateur d'entreprise pr\u00e9sentait des erreurs de donn\u00e9es intermittentes.<\/p><p><strong>Analyse<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Les tests TDR ont r\u00e9v\u00e9l\u00e9 une variation d'imp\u00e9dance de 15 %.<\/li>\n\n<li>Cause premi\u00e8re : Insuffisance des vias de masse autour des paires diff\u00e9rentielles.<\/li>\n\n<li>Les traces de surface ne tenaient pas compte des effets du masque de soudure.<\/li><\/ol><p><strong>Solution<\/strong>:<\/p><ol class=\"wp-block-list\"><li>Augmentation de la densit\u00e9 de l'aide au sol (une pour 200 millions d'habitants).<\/li>\n\n<li>Largeur de trace ajust\u00e9e pour la compensation du masque de soudure (5mil\u21924,8mil).<\/li>\n\n<li>Passage \u00e0 un masque de soudure \u00e0 faible Dk (\u03b5r=3,0).<\/li><\/ol><p><strong>R\u00e9sultat<\/strong>: Variation d'imp\u00e9dance r\u00e9duite \u00e0 &lt;5%, taux d'erreur binaire am\u00e9lior\u00e9 de 100\u00d7 !<\/p><p><strong><a href=\"https:\/\/www.topfastpcb.com\/fr\/contact\/\">Conception professionnelle du contr\u00f4le de l'imp\u00e9dance<\/a> pour prot\u00e9ger votre conception \u00e9lectronique.<\/strong><\/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\/impedance-control-1.jpg\" alt=\"contr\u00f4le de l&#039;imp\u00e9dance\" class=\"wp-image-3489\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2025\/06\/impedance-control-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Emerging_Technologies\"><\/span>Technologies \u00e9mergentes<span class=\"ez-toc-section-end\"><\/span><\/h2><ol class=\"wp-block-list\"><li><strong>Mat\u00e9riaux \u00e0 tr\u00e8s faibles pertes<\/strong>: par exemple, Panasonic MEGTRON6 (Df=0,002).<\/li>\n\n<li><strong>Technologie di\u00e9lectrique hybride<\/strong>: Combinaison de mat\u00e9riaux avec diff\u00e9rentes valeurs de Dk pour l'optimisation de l'imp\u00e9dance localis\u00e9e.<\/li>\n\n<li><strong>Circuits imprim\u00e9s en 3D<\/strong>: Permettre des structures \u00e0 imp\u00e9dance graduelle.<\/li>\n\n<li><strong>Conception assist\u00e9e par l'IA<\/strong>Automatisation de l'optimisation des r\u00e9seaux d'adaptation d'imp\u00e9dance.<\/li><\/ol><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Engineers_Checklist\"><\/span>Liste de contr\u00f4le de l'ing\u00e9nieur<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Avant de soumettre un circuit imprim\u00e9 \u00e0 la fabrication, v\u00e9rifiez-le :<\/p><p>Confirmation des sp\u00e9cifications des mat\u00e9riaux et des capacit\u00e9s de traitement avec le fabricant.<br>Simulation d'imp\u00e9dance pour les r\u00e9seaux critiques.<br>Respect des exigences en mati\u00e8re d'adaptation de la longueur des paires diff\u00e9rentielles.<br>Optimis\u00e9 par les structures.<br>Conception de coupons d'essai.<br>Sp\u00e9cifications d'imp\u00e9dance document\u00e9es.<\/p><p>Avec le d\u00e9veloppement rapide de la 5G, de l'IA et des technologies IoT, la demande en mati\u00e8re d'int\u00e9grit\u00e9 des signaux \u00e0 grande vitesse ne fera que cro\u00eetre. En ma\u00eetrisant la technologie de base du contr\u00f4le de l'imp\u00e9dance des circuits imprim\u00e9s, vous serez en mesure d'exceller dans la conception de circuits imprim\u00e9s \u00e0 grande vitesse et d'assurer la stabilit\u00e9 et la fiabilit\u00e9 de vos produits.<\/p><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Le contr\u00f4le de l'imp\u00e9dance des circuits imprim\u00e9s est une technologie de base dans la conception de circuits \u00e0 grande vitesse, qui affecte directement l'int\u00e9grit\u00e9 du signal et les performances du syst\u00e8me. Comment obtenir une adaptation parfaite de l'imp\u00e9dance gr\u00e2ce \u00e0 une s\u00e9lection pr\u00e9cise des mat\u00e9riaux, \u00e0 la conception de l'empilement des couches, au calcul de la largeur des lignes et au contr\u00f4le du processus, afin de prot\u00e9ger votre conception \u00e9lectronique.<\/p>","protected":false},"author":1,"featured_media":3486,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109],"tags":[311,110],"class_list":["post-3485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faq","tag-impedance-control","tag-pcb-design"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to design impedance control for PCB? - Topfastpcb<\/title>\n<meta name=\"description\" content=\"How to design impedance control for PCBs? 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