source:Industry News release time:2022-08-16 Article author:yu Popular:pcb
The quality control work in the circuit board processing stage mainly includes the following contents.
(1) The quality department and the purchasing department will conduct on-site inspection and certification of the qualification and production capacity of the PCB circuit board manufacturer to ensure that the PCB circuit board manufacturer has the ability to complete the production task.
(2) The designer should re-examine the drawings used by the PCB manufacturer. Because the design of the printed board is often not a success, it needs to be revised several times. PCB circuit board manufacturers will have multiple versions of the processing drawings, so it is necessary to reconfirm the final processing drawings to ensure that the processed printed boards meet the requirements of the final version.
(3) Focus on the key processes in the production of printed circuit boards. Its quality has a great impact on the performance and reliability of the printed board, and quality control should be strengthened. Supervise and review the key process procedures formulated by the manufacturer, such as etching, hole metallization, etc., to ensure that the printed lines and pads are free of burrs, gaps, and bridge defects, and vias are free of nodules and voids. The "lamination" of multi-layer printed boards should also focus on quality control to ensure the thickness, bonding strength and positioning accuracy of the printed boards. High-frequency boards and microstrip boards usually require gold plating, and special gold-plating process work instructions should be formulated to ensure the thickness and purity of the coating.
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