{"id":8034,"date":"2025-10-17T16:57:01","date_gmt":"2025-10-17T08:57:01","guid":{"rendered":"https:\/\/topfastpcba.com\/?p=8034"},"modified":"2025-10-22T16:44:55","modified_gmt":"2025-10-22T08:44:55","slug":"pcb-circuit-board-characteristic-inspection-items-and-solutions","status":"publish","type":"post","link":"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/","title":{"rendered":"\u00c9l\u00e9ments caract\u00e9ristiques des cartes de circuits imprim\u00e9s et solutions"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_75 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:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#Electrical_Characteristic_Inspection_Solutions\" >Solutions d'inspection des caract\u00e9ristiques \u00e9lectriques<\/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:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#1_Has_the_influence_of_conductor_resistance_inductance_and_capacitance_been_analyzed\" >(1) L'influence de la r\u00e9sistance, de l'inductance et de la capacit\u00e9 du conducteur a-t-elle \u00e9t\u00e9 analys\u00e9e ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#2_Do_the_spacing_and_shape_of_conductor_attachments_meet_insulation_requirements\" >(2) L'espacement et la forme des fixations des conducteurs r\u00e9pondent-ils aux exigences en mati\u00e8re d'isolation ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#3_Are_insulation_resistance_values_controlled_and_specified_at_critical_locations\" >(3) Les valeurs de r\u00e9sistance d'isolement sont-elles contr\u00f4l\u00e9es et sp\u00e9cifi\u00e9es aux endroits critiques ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#4_Is_polarity_fully_identified\" >(4) La polarit\u00e9 est-elle clairement identifi\u00e9e ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#5_Has_the_influence_of_conductor_spacing_on_leakage_resistance_and_voltage_been_evaluated_from_a_geometric_perspective\" >(5) L'influence de l'espacement des conducteurs sur la r\u00e9sistance aux fuites et la tension a-t-elle \u00e9t\u00e9 \u00e9valu\u00e9e d'un point de vue g\u00e9om\u00e9trique ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#6_Have_the_media_of_changed_surface_coatings_been_certified\" >(6) Les supports dont le rev\u00eatement de surface a \u00e9t\u00e9 modifi\u00e9 ont-ils \u00e9t\u00e9 certifi\u00e9s ?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#Physical_Characteristic_Inspection_Solutions\" >Solutions d'inspection des caract\u00e9ristiques physiques<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#1_Are_all_pads_and_their_positions_suitable_for_final_assembly\" >(1) Tous les patins et leur position sont-ils adapt\u00e9s \u00e0 l'assemblage final ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#2_Does_the_assembled_printed_circuit_board_meet_shock_and_vibration_conditions\" >(2) La carte de circuit imprim\u00e9 assembl\u00e9e r\u00e9siste-t-elle aux chocs et aux vibrations ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#3_What_is_the_spacing_of_the_specified_standard_components\" >(3) Quel est l'espacement des composants standard sp\u00e9cifi\u00e9s ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#4_Are_loosely_mounted_components_or_heavier_parts_securely_fixed\" >(4) Les composants mal fix\u00e9s ou les pi\u00e8ces lourdes sont-ils solidement fix\u00e9s ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#5_Is_heat_dissipation_for_heating_elements_correct_Are_they_isolated_from_the_PCB_and_other_heat-sensitive_components\" >(5) La dissipation thermique des \u00e9l\u00e9ments chauffants est-elle correcte ? Sont-ils isol\u00e9s du circuit imprim\u00e9 et des autres composants sensibles \u00e0 la chaleur ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#6_Are_voltage_dividers_and_other_multi-lead_components_correctly_positioned\" >(6) Les diviseurs de tension et autres composants \u00e0 plusieurs broches sont-ils correctement positionn\u00e9s ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#7_Is_the_component_arrangement_and_orientation_conducive_to_inspection\" >(7) La disposition et l'orientation des composants facilitent-elles l'inspection ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#8_Have_all_potential_interferences_between_the_PCB_and_the_entire_board_assembly_been_eliminated\" >(8) Toutes les interf\u00e9rences potentielles entre le circuit imprim\u00e9 et l'ensemble de la carte ont-elles \u00e9t\u00e9 \u00e9limin\u00e9es ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#9_Are_the_dimensions_of_the_positioning_holes_correct\" >(9) Les dimensions des trous de positionnement sont-elles correctes ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#10_Are_the_tolerances_complete_and_reasonable\" >(10) Les tol\u00e9rances sont-elles compl\u00e8tes et raisonnables ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#11_Have_the_physical_properties_of_all_coatings_been_controlled_and_qualified\" >(11) Les propri\u00e9t\u00e9s physiques de tous les rev\u00eatements ont-elles \u00e9t\u00e9 contr\u00f4l\u00e9es et valid\u00e9es ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#12_Is_the_hole-to-lead_diameter_ratio_within_an_acceptable_range\" >(12) Le rapport entre le diam\u00e8tre du trou et celui du conducteur se situe-t-il dans une plage acceptable ?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#13_Does_the_PCB_meet_Electromagnetic_Compatibility_EMC_requirements\" >(13) Le circuit imprim\u00e9 r\u00e9pond-il aux exigences en mati\u00e8re de compatibilit\u00e9 \u00e9lectromagn\u00e9tique (CEM) ?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Electrical_Characteristic_Inspection_Solutions\"><\/span>Solutions d'inspection des caract\u00e9ristiques \u00e9lectriques<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Has_the_influence_of_conductor_resistance_inductance_and_capacitance_been_analyzed\"><\/span>(1) L'influence de la r\u00e9sistance, de l'inductance et de la capacit\u00e9 du conducteur a-t-elle \u00e9t\u00e9 analys\u00e9e ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Adoptez une m\u00e9thode combin\u00e9e d'analyse par simulation et de tests r\u00e9els. Utilisez des outils de simulation SI\/PI (par exemple, HyperLynx, ADS) pour extraire les param\u00e8tres parasites avant la mise en page, en analysant l'int\u00e9grit\u00e9 des signaux haute fr\u00e9quence et l'imp\u00e9dance du r\u00e9seau d'alimentation \u00e9lectrique. Pour les circuits \u00e0 haute vitesse, mettez en \u0153uvre une conception d'adaptation d'imp\u00e9dance et une optimisation de la topologie, v\u00e9rifi\u00e9es par des mesures de r\u00e9flectom\u00e9trie dans le domaine temporel. \u00c9tablissez des r\u00e8gles de conception des circuits imprim\u00e9s, en fixant des exigences strictes en mati\u00e8re d'adaptation de la longueur et de la largeur pour les lignes de signaux critiques (par exemple, horloges, paires diff\u00e9rentielles). Utilisez la m\u00e9thode \u00e0 quatre fils pour mesurer la r\u00e9sistance des conducteurs au niveau du milliohm, un analyseur de r\u00e9seau pour les param\u00e8tres d'inductance et un mesureur LCR pour la capacit\u00e9 distribu\u00e9e. Comparez les r\u00e9sultats avec les sp\u00e9cifications de conception afin de vous assurer que les param\u00e8tres parasites se situent dans les limites autoris\u00e9es, ce qui permet d'\u00e9viter la distorsion des signaux, les probl\u00e8mes de synchronisation et les interf\u00e9rences \u00e9lectromagn\u00e9tiques.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Do_the_spacing_and_shape_of_conductor_attachments_meet_insulation_requirements\"><\/span>(2) L'espacement et la forme des fixations des conducteurs r\u00e9pondent-ils aux exigences en mati\u00e8re d'isolation ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Mettre en \u0153uvre une double v\u00e9rification de la DFM (conception pour la fabricabilit\u00e9) et de la DFA (conception pour la fiabilit\u00e9). D\u00e9terminer l'espacement minimum en fonction du niveau de tension sur la base des normes IPC-2221 (par exemple, espacement de 0,1 mm pour 100 V CC). Utiliser un logiciel de FAO pour les contr\u00f4les automatiques d'espacement, en mettant en \u0153uvre une conception d'isolation renforc\u00e9e pour les zones \u00e0 haute tension (par exemple, les modules d'alimentation).Optimisez les angles des conducteurs en utilisant des angles de 45 degr\u00e9s ou des arcs afin d'\u00e9viter la concentration du champ \u00e9lectrique due aux angles vifs. Effectuez des tests de tension de tenue en appliquant 2 \u00e0 3 fois la tension de fonctionnement pendant 1 minute, afin de vous assurer qu'aucune rupture ne se produit. Mettez en \u0153uvre une simulation de champ \u00e9lectromagn\u00e9tique pour les circuits \u00e0 haute fr\u00e9quence, en analysant les effets de champ marginal afin de vous assurer que les exigences d'isolation sont respect\u00e9es dans les conditions de fonctionnement r\u00e9elles.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Are_insulation_resistance_values_controlled_and_specified_at_critical_locations\"><\/span>(3) Les valeurs de r\u00e9sistance d'isolement sont-elles contr\u00f4l\u00e9es et sp\u00e9cifi\u00e9es aux endroits critiques ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Establish a critical point insulation resistance control system. Identify key areas such as high-voltage zones, high-frequency circuits, and high-impedance applications, marking insulation resistance test points in the design. Select appropriate insulating materials (e.g., FR-4, polyimide) according to IEC-60112 standards, with surface treatment using solder mask. Use an insulation resistance tester (e.g., megohmmeter) to measure at 500V DC, ensuring insulation resistance \u2265100M\u03a9 at key locations (\u226510M\u03a9 under high temperature\/humidity). Implement accelerated life testing, monitoring insulation resistance decay over 500 hours at 85\u00b0C\/85% RH, ensuring the product meets safety standards throughout its lifecycle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Is_polarity_fully_identified\"><\/span>(4) La polarit\u00e9 est-elle clairement identifi\u00e9e ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Build a multiple-polarity identification and error-proofing system. During PCB layout, use standardized packages for polar components (e.g., electrolytic capacitors, diodes, connectors), clearly marking polarity symbols (+, &#8211; \u25b3) on the silkscreen layer. Establish a DFA checklist requiring polarity mark size \u22651.5mm, positioned \u22640.5mm from the component body. Use asymmetric package designs to prevent 180-degree misinsertion. In the assembly process, set up AOI (Automated Optical Inspection) polarity check stations, using color recognition technology to distinguish polarity direction. Create first-article samples before mass production, verified by 3 independent personnel 3 times, ensuring the polarity identification system is reliable and effective.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Has_the_influence_of_conductor_spacing_on_leakage_resistance_and_voltage_been_evaluated_from_a_geometric_perspective\"><\/span>(5) L'influence de l'espacement des conducteurs sur la r\u00e9sistance aux fuites et la tension a-t-elle \u00e9t\u00e9 \u00e9valu\u00e9e d'un point de vue g\u00e9om\u00e9trique ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Mettez en \u0153uvre une conception collaborative des performances \u00e9lectriques bas\u00e9e sur des param\u00e8tres g\u00e9om\u00e9triques. Utilisez un logiciel de simulation de champ \u00e9lectromagn\u00e9tique (par exemple, ANSYS HFSS) pour cr\u00e9er des mod\u00e8les g\u00e9om\u00e9triques de circuits imprim\u00e9s, en analysant la distribution du champ \u00e9lectrique et le courant de fuite \u00e0 diff\u00e9rents espacements. \u00c9tablissez un tableau de r\u00e9f\u00e9rence espacement-tension conform\u00e9ment aux normes IPC-2221A (par exemple, 0,1 mm pour 50 V, 0,2 mm pour 100 V).Utiliser des conceptions \u00e0 fentes pour les applications haute tension afin d'augmenter la distance de fuite, et mettre en \u0153uvre des structures de guides d'ondes coplanaires mis \u00e0 la terre pour les signaux haute fr\u00e9quence. V\u00e9rifier la continuit\u00e9 de l'imp\u00e9dance via des mesures TDR, en utilisant un testeur de r\u00e9sistance de surface pour mesurer la r\u00e9sistance de fuite. \u00c9tablir une biblioth\u00e8que de r\u00e8gles de conception reliant les param\u00e8tres g\u00e9om\u00e9triques aux performances \u00e9lectriques, permettant une v\u00e9rification et une optimisation automatis\u00e9es.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Have_the_media_of_changed_surface_coatings_been_certified\"><\/span>(6) Les supports dont le rev\u00eatement de surface a \u00e9t\u00e9 modifi\u00e9 ont-ils \u00e9t\u00e9 certifi\u00e9s ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Establish a surface coating change certification process. Any coating change must pass complete qualification testing, including adhesion test (cross-cut \u22654B), chemical resistance test (resisting flux, cleaners), and dielectric constant measurement (1kHz-1GHz band). Perform damp heat cycling tests (-40\u00b0C to +85\u00b0C, 1000 cycles) to evaluate insulation resistance stability. Use SEM to analyze coating thickness uniformity (target 15-30\u03bcm). For high-frequency circuits, measure the coating&#8217;s impact on signal loss (\u22640.02dB\/inch). Establish a qualified supplier list, requiring material certificates and RoHS compliance certificates for each batch, ensuring consistent and reliable coating performance.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items.jpg\" alt=\"\u00c9l\u00e9ments d&#039;inspection des circuits imprim\u00e9s\" class=\"wp-image-8036\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items.jpg 600w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-300x201.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-18x12.jpg 18w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-150x101.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Physical_Characteristic_Inspection_Solutions\"><\/span>Solutions d'inspection des caract\u00e9ristiques physiques<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Are_all_pads_and_their_positions_suitable_for_final_assembly\"><\/span>(1) Tous les patins et leur position sont-ils adapt\u00e9s \u00e0 l'assemblage final ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Implement DFA-based pad optimization design. Use 3D modeling software (e.g., SolidWorks PCB) for virtual assembly, verifying component pad-to-housing clearance (\u22650.5mm). Optimize pad dimensions according to IPC-7351 standards, establishing a component library update mechanism. Implement a pad steal design for BGA devices to prevent solder bridging. Use stepped pad designs to address height restrictions. Create assembly verification fixtures for actual insertion testing. Establish pad design specifications, clearly defining solder mask dam size (\u22650.1mm), pad-to-trace transition ratios, ensuring solder yield \u226599.5%.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Does_the_assembled_printed_circuit_board_meet_shock_and_vibration_conditions\"><\/span>(2) La carte de circuit imprim\u00e9 assembl\u00e9e r\u00e9siste-t-elle aux chocs et aux vibrations ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Build a mechanical reliability verification system. Select appropriate test standards (e.g., JESD22-B104) based on the product application environment (e.g., automotive, industrial). Perform modal analysis during the design phase to avoid coincident natural frequencies with operating frequencies (safety factor \u22651.35). Add mechanical fixation (e.g., screws, adhesive) for components weighing \u226515g. Conduct vibration tests (5-500Hz, 1 hour per axis) and shock tests (half-sine wave, 50G, 6ms). Use high-speed cameras to analyze board assembly dynamic response, and strain gauges to measure stress at key points. Optimize PCB support point layout, ensuring no component detachment, solder joint cracks, or other failures after reliability testing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_What_is_the_spacing_of_the_specified_standard_components\"><\/span>(3) Quel est l'espacement des composants standard sp\u00e9cifi\u00e9s ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Establish component spacing standards based on process capability. Develop tiered spacing specifications according to IPC-7351 and actual factory process levels: chip components \u22650.3mm, SOIC devices \u22650.6mm, QFP devices \u22650.8mm, BGA devices \u22650.5mm. Add an additional 0.5mm clearance for components beneath heat sinks. Automatically validate spacing compliance using DFM inspection software. Implement a local spacing exemption process for high-density designs, subject to process validation. Establish a component database containing 3D models and recommended spacing. New components must undergo spacing compatibility review before being added to the database to ensure manufacturability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Are_loosely_mounted_components_or_heavier_parts_securely_fixed\"><\/span>(4) Les composants mal fix\u00e9s ou les pi\u00e8ces lourdes sont-ils solidement fix\u00e9s ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Implement specialized fixation solutions for heavy components. Create a list of components weighing \u22655g or size \u226515mm, mandating mechanical fixation. Use screws + washers for transformers and large electrolytic capacitors, specifying screw torque (e.g., 0.6N\u00b7m \u00b110%). Use high-temperature adhesive for medium-sized components, verifying bond strength after 24 hours at 85\u00b0C. Reserve space for fixation structures around heavy components during design. Specify fixation operation procedures in process documents, setting dedicated inspection points for fixation stations. After mechanical shock testing, use X-ray to inspect the solder joint and the fixation structure integrity, ensuring secure fixation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Is_heat_dissipation_for_heating_elements_correct_Are_they_isolated_from_the_PCB_and_other_heat-sensitive_components\"><\/span>(5) La dissipation thermique des \u00e9l\u00e9ments chauffants est-elle correcte ? Sont-ils isol\u00e9s du circuit imprim\u00e9 et des autres composants sensibles \u00e0 la chaleur ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Build a thermal design and management verification system. Use thermal simulation software (e.g., FloTHERM) to identify heat sources and thermally sensitive components, optimizing layout spacing (\u22655mm between heat sources and thermally sensitive components). Use thermal vias (0.3mm diameter, 1mm pitch) for power devices, connected to internal ground planes for heat dissipation. Ensure thermal grease thickness is 0.1-0.15mm at the interface when adding heat sinks. Perform infrared thermal imaging tests, verifying actual temperatures do not exceed 85% of rated values. Implement thermal isolation measures for high-temperature areas: adding heat shields, using high-temperature solder, and setting up heat dissipation channels. Establish temperature rise test standards, ensuring maximum PCB surface temperature difference \u226425\u00b0C.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_Are_voltage_dividers_and_other_multi-lead_components_correctly_positioned\"><\/span>(6) Les diviseurs de tension et autres composants \u00e0 plusieurs broches sont-ils correctement positionn\u00e9s ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Implement precise positioning control for multi-lead components. Use an optical positioning system (e.g., Fiducial Mark), placing \u22652 fiducials around each multi-lead component, 0.5-1mm from pads. For high-precision components like voltage dividers, maintain symmetry and equal-length routing during layout to minimize temperature gradient effects. Use package designs with pad center-to-center accuracy of \u00b10.05mm. Set component image recognition parameters in the placement program, with rotation tolerance \u22641\u00b0. Verify positioning accuracy on the first article using a 3D measuring instrument, sampling every 2 hours during mass production. Establish a multi-lead component database containing recommended layouts and inspection requirements, ensuring positioning consistency.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Is_the_component_arrangement_and_orientation_conducive_to_inspection\"><\/span>(7) La disposition et l'orientation des composants facilitent-elles l'inspection ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Optimize component layout for visual inspection. Develop component orientation standards: unify direction for the same type of component (e.g., all chip pin 1s facing left), polarity marks facing the same direction. Ensure component spacing allows AOI camera viewing angle \u226545\u00b0, and 100% probe accessibility. Reserve inspection windows adjacent to bottom-termination components (e.g., QFN). Implement a layered inspection strategy for high-density areas: inspect large components first, then use microscopes for fine-pitch components. Establish a DFA checklist containing 25 visibility criteria. Create inspection fixtures, verifying 100% inspection coverage and \u22640.1% false call rate.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-2.jpg\" alt=\"\u00c9l\u00e9ments d&#039;inspection des circuits imprim\u00e9s\" class=\"wp-image-8037\" srcset=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-2.jpg 600w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-2-300x201.jpg 300w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-2-18x12.jpg 18w, https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-2-150x101.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"8_Have_all_potential_interferences_between_the_PCB_and_the_entire_board_assembly_been_eliminated\"><\/span>(8) Toutes les interf\u00e9rences potentielles entre le circuit imprim\u00e9 et l'ensemble de la carte ont-elles \u00e9t\u00e9 \u00e9limin\u00e9es ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Implement system-level interference analysis and elimination strategies. Use 3D modeling for mechanical interference checking, ensuring clearance to housing and connectors \u22650.3mm. Set keep-out zones around tall components, with \u22652mm spacing from adjacent boards. Match coefficients of thermal expansion to avoid structural interference from temperature cycling. Optimize assembly sequence, installing short\/small components before tall\/large ones. Create rapid prototypes for assembly verification, using feeler gauges to measure critical clearances. Establish an interference check matrix covering all possible combination states, ensuring no risk of physical interference.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"9_Are_the_dimensions_of_the_positioning_holes_correct\"><\/span>(9) Les dimensions des trous de positionnement sont-elles correctes ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Establish a positioning hole accuracy control system. According to IPC-2221 standards, the positioning hole diameter should be 0.1-0.3mm larger than the fixing pin (for board edge holes) or 0.05-0.1mm larger (for internal holes). For 4-layer boards, set a keep-out zone (\u22651.5 times hole diameter) around positioning holes. For plated positioning holes, ensure the inner wall copper thickness \u226525\u03bcm for mechanical strength. Check the first article of each PCB batch using pin gauges for hole diameter (tolerance \u00b10.05mm), and a CMM for hole position accuracy (\u00b10.1mm). Install positioning detection sensors in assembly fixtures, with automatic alarms for anomalies, ensuring 100% positioning reliability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"10_Are_the_tolerances_complete_and_reasonable\"><\/span>(10) Les tol\u00e9rances sont-elles compl\u00e8tes et raisonnables ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Implement process capability-based tolerance design. Analyze process capability indices (Cp\u22651.33, Cpk\u22651.0) for each PCB manufacturing and assembly step, setting reasonable tolerances: line width tolerance \u00b110%, hole position tolerance \u00b10.05mm, board warpage \u22640.75%. Use statistical tolerance analysis to avoid tolerance stack-up exceeding limits. Implement tightened tolerance control for critical dimensions, e.g., BGA pad diameter tolerance \u00b10.02mm. Establish a tolerance allocation table, clearly defining responsibilities for design, manufacturing, and assembly. Use GD&amp;T standards on drawings, regularly review tolerance applicability, and continuously optimize based on actual yield data.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_Have_the_physical_properties_of_all_coatings_been_controlled_and_qualified\"><\/span>(11) Les propri\u00e9t\u00e9s physiques de tous les rev\u00eatements ont-elles \u00e9t\u00e9 contr\u00f4l\u00e9es et valid\u00e9es ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Establish a full lifecycle quality management system for coatings. Set physical property standards for solder mask, silkscreen, and surface finishes (e.g., ENIG, OSP): solder mask thickness 15-25\u03bcm, adhesion \u22654B, hardness \u22656H. Perform sampling inspection for each incoming batch: use thickness gauges for uniformity, cross-cut test for adhesion, wear resistance tester for hardness. Conduct accelerated aging tests (1000 hours at 85\u00b0C\/85% RH) to verify physical property stability. Establish a material traceability system, strictly control storage conditions (temperature 15-30\u00b0C, humidity &lt;60%), clearly mark expiration dates, and ensure consistent and reliable coating performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_Is_the_hole-to-lead_diameter_ratio_within_an_acceptable_range\"><\/span>(12) Le rapport entre le diam\u00e8tre du trou et celui du conducteur se situe-t-il dans une plage acceptable ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Implement aperture and lead matching design controls. According to IPC-2221 standards, set appropriate aspect ratios for different component types: Through-hole components require apertures 0.2-0.4mm larger than lead diameter, with a 0.1-0.3mm solder pad; press-fit components require apertures 0.05-0.1mm larger than lead diameter. Employ DFM analysis software to automatically verify aperture ratio compliance. Implement microvia design for high-density boards while ensuring the aperture ratio does not exceed 10:1 (board thickness: aperture diameter). Fabricate aperture ratio verification prototypes and conduct through-hole solder fill rate testing, requiring a fill rate \u226575%. Establish aperture ratio design specifications; new components must pass aperture ratio compatibility review before inventory acceptance to ensure reliable solderability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"13_Does_the_PCB_meet_Electromagnetic_Compatibility_EMC_requirements\"><\/span>(13) Le circuit imprim\u00e9 r\u00e9pond-il aux exigences en mati\u00e8re de compatibilit\u00e9 \u00e9lectromagn\u00e9tique (CEM) ?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Solution :<\/strong> Construisez un syst\u00e8me de contr\u00f4le CEM complet, de la conception aux tests. Mettez en \u0153uvre une co-simulation SI\/PI\/CEM pendant la conception afin d'identifier les sources d'interf\u00e9rences potentielles et les circuits sensibles. Adoptez une strat\u00e9gie de mise \u00e0 la terre par couches, en isolant les zones num\u00e9riques, analogiques et d'alimentation. Fournissez des plans de r\u00e9f\u00e9rence complets pour les signaux \u00e0 haute vitesse, en \u00e9vitant les divisions crois\u00e9es. Placez des vias de mise \u00e0 la terre autour des circuits d'horloge pour le blindage et utilisez des structures \u00e0 ligne triplaque pour les signaux critiques.Ajoutez les circuits de filtrage n\u00e9cessaires (par exemple, perles de ferrite, diodes TVS). Utilisez des \u00e9quipements de test CEM (analyseur de spectre, r\u00e9cepteur EMI) pour les tests de pr\u00e9-conformit\u00e9, afin de diagnostiquer les probl\u00e8mes d'\u00e9missions rayonn\u00e9es et conduites. Gr\u00e2ce \u00e0 l'optimisation de la disposition\/du routage, \u00e0 l'ajout de blindages, etc., assurez la conformit\u00e9 aux normes FCC, CE et autres normes CEM, et r\u00e9ussissez les tests de certification d\u00e8s la premi\u00e8re tentative.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>L'inspection des caract\u00e9ristiques des circuits imprim\u00e9s est une \u00e9tape cruciale pour garantir que les cartes de circuits imprim\u00e9s r\u00e9pondent aux sp\u00e9cifications de conception et aux normes de qualit\u00e9. Cette liste de contr\u00f4le exhaustive, qui couvre les inspections des caract\u00e9ristiques \u00e9lectriques et physiques, fournit aux ing\u00e9nieurs concepteurs de circuits imprim\u00e9s un syst\u00e8me de r\u00e9f\u00e9rence complet pour le contr\u00f4le qualit\u00e9.<\/p>","protected":false},"author":2,"featured_media":8035,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[52],"class_list":["post-8034","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-pcb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB Circuit Board Characteristic Inspection Items and Solutions - Topfastpcba<\/title>\n<meta name=\"description\" content=\"A comprehensive checklist and professional solutions for PCB circuit board characteristic inspections, covering critical aspects such as electrical property checks and physical property inspections. Provides practical solutions for issues including trace resistance, insulation spacing, pad design, and thermal management.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PCB Circuit Board Characteristic Inspection Items and Solutions - Topfastpcba\" \/>\n<meta property=\"og:description\" content=\"A comprehensive checklist and professional solutions for PCB circuit board characteristic inspections, covering critical aspects such as electrical property checks and physical property inspections. Provides practical solutions for issues including trace resistance, insulation spacing, pad design, and thermal management.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/\" \/>\n<meta property=\"og:site_name\" content=\"Topfastpcba\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-17T08:57:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-22T08:44:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"402\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"topfastpcb\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"topfastpcb\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"10 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/\",\"url\":\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/\",\"name\":\"PCB Circuit Board Characteristic Inspection Items and Solutions - Topfastpcba\",\"isPartOf\":{\"@id\":\"https:\/\/topfastpcba.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg\",\"datePublished\":\"2025-10-17T08:57:01+00:00\",\"dateModified\":\"2025-10-22T08:44:55+00:00\",\"author\":{\"@id\":\"https:\/\/topfastpcba.com\/#\/schema\/person\/3c78a799254faaf83da2317660076c6e\"},\"description\":\"A comprehensive checklist and professional solutions for PCB circuit board characteristic inspections, covering critical aspects such as electrical property checks and physical property inspections. Provides practical solutions for issues including trace resistance, insulation spacing, pad design, and thermal management.\",\"breadcrumb\":{\"@id\":\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#primaryimage\",\"url\":\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg\",\"contentUrl\":\"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg\",\"width\":600,\"height\":402,\"caption\":\"PCB Inspection Items\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/topfastpcba.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Industry\",\"item\":\"https:\/\/topfastpcba.com\/category\/industry\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"PCB Circuit Board Characteristic Inspection Items and Solutions\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/topfastpcba.com\/#website\",\"url\":\"https:\/\/topfastpcba.com\/\",\"name\":\"Topfastpcba\",\"description\":\"Topfast Prime Choice for Global Electronics Manufacturing\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/topfastpcba.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/topfastpcba.com\/#\/schema\/person\/3c78a799254faaf83da2317660076c6e\",\"name\":\"topfastpcb\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"PCB Circuit Board Characteristic Inspection Items and Solutions - Topfastpcba","description":"A comprehensive checklist and professional solutions for PCB circuit board characteristic inspections, covering critical aspects such as electrical property checks and physical property inspections. Provides practical solutions for issues including trace resistance, insulation spacing, pad design, and thermal management.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/","og_locale":"fr_FR","og_type":"article","og_title":"PCB Circuit Board Characteristic Inspection Items and Solutions - Topfastpcba","og_description":"A comprehensive checklist and professional solutions for PCB circuit board characteristic inspections, covering critical aspects such as electrical property checks and physical property inspections. Provides practical solutions for issues including trace resistance, insulation spacing, pad design, and thermal management.","og_url":"https:\/\/topfastpcba.com\/fr\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/","og_site_name":"Topfastpcba","article_published_time":"2025-10-17T08:57:01+00:00","article_modified_time":"2025-10-22T08:44:55+00:00","og_image":[{"width":600,"height":402,"url":"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg","type":"image\/jpeg"}],"author":"topfastpcb","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"topfastpcb","Dur\u00e9e de lecture estim\u00e9e":"10 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/","url":"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/","name":"PCB Circuit Board Characteristic Inspection Items and Solutions - Topfastpcba","isPartOf":{"@id":"https:\/\/topfastpcba.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#primaryimage"},"image":{"@id":"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#primaryimage"},"thumbnailUrl":"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg","datePublished":"2025-10-17T08:57:01+00:00","dateModified":"2025-10-22T08:44:55+00:00","author":{"@id":"https:\/\/topfastpcba.com\/#\/schema\/person\/3c78a799254faaf83da2317660076c6e"},"description":"A comprehensive checklist and professional solutions for PCB circuit board characteristic inspections, covering critical aspects such as electrical property checks and physical property inspections. Provides practical solutions for issues including trace resistance, insulation spacing, pad design, and thermal management.","breadcrumb":{"@id":"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/"]}]},{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#primaryimage","url":"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg","contentUrl":"https:\/\/topfastpcba.com\/wp-content\/uploads\/2025\/10\/PCB-Inspection-Items-1.jpg","width":600,"height":402,"caption":"PCB Inspection Items"},{"@type":"BreadcrumbList","@id":"https:\/\/topfastpcba.com\/pcb-circuit-board-characteristic-inspection-items-and-solutions\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/topfastpcba.com\/"},{"@type":"ListItem","position":2,"name":"Industry","item":"https:\/\/topfastpcba.com\/category\/industry\/"},{"@type":"ListItem","position":3,"name":"PCB Circuit Board Characteristic Inspection Items and Solutions"}]},{"@type":"WebSite","@id":"https:\/\/topfastpcba.com\/#website","url":"https:\/\/topfastpcba.com\/","name":"Topfastpcba","description":"Topfast Prime Choice for Global Electronics Manufacturing","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/topfastpcba.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/topfastpcba.com\/#\/schema\/person\/3c78a799254faaf83da2317660076c6e","name":"topfastpcb"}]}},"_links":{"self":[{"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/posts\/8034","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/comments?post=8034"}],"version-history":[{"count":1,"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/posts\/8034\/revisions"}],"predecessor-version":[{"id":8038,"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/posts\/8034\/revisions\/8038"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/media\/8035"}],"wp:attachment":[{"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/media?parent=8034"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/categories?post=8034"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/topfastpcba.com\/fr\/wp-json\/wp\/v2\/tags?post=8034"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}