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Key Standards for PCB Acceptance

1. Board Edge Quality


  • Board edge damage: No damage is considered qualified, minor damage does not cause delamination, which is acceptable. Severe delamination or board corner damage exceeding 5.0mm is considered unqualified, and rework, repair, or scrapping may be necessary depending on the situation.


  • Board surface stains: The board surface is required to be clean and free of stains, and there are oil stains, adhesives, etc. that cannot be removed and need special treatment or disposal.


  • Copper residue on the board surface: A small amount of copper residue is allowed, but specific conditions must be met, such as being at least 0.2mm away from the nearest conductor, and there are limitations on the area and quantity.


  • Tin residue: The surface of the board should have Wuxi residue, and if any residue is found, it needs to be cleaned.


  • Foreign objects: Non conductive foreign objects must be kept away from the conductor and have limited size and quantity, otherwise they need to be reworked or removed.


  • Scratches/Scratches: Conductors or substrate fibers should not be exposed, minor scratches can be repaired, and severe cases require disposal.


  • Substrate Indentations and Pits: The substrate must not have indentations that cause conductor bridging, and there are strict limitations on the size and distribution of indentations.


PCB-high-quality


2. Quality of Holes


  • PTH/NPTH hole ring: Accurate hole position is required, and the edge damage of the solder pad should be controlled within a certain range, without affecting the welding quality.



3. Character Quality


  • Misprinting, blurring, and misalignment of characters: Characters must be clear, correct, and accurately positioned, and any errors or blurring are not qualified.


  • Marking ink: Avoid ink covering the solder pads to ensure welding reliability.



4. Resistance Welding Quality


  • Solder resistance film: It is required to have no peeling, bubbling, or delamination, with a moderate and accurate thickness to prevent short circuits and improve insulation performance.


  • Resistance welding bridge: Keep intact, avoid breakage, to ensure correct fixation of components and electrical isolation.

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