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What points should be paid attention to in the quality management of pcb circuit boards?
2021-09-10
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Author:Frank

      The quality control of printing plates is mainly aimed at the design, processing and inspection of printing plates, as well as monitoring and measurement.
What points should be paid attention to in the quality management of pcb circuit boards? Jiehao Flexible Circuit Board Factory will organize the following information for you:
The quality control of printing plates is mainly aimed at the design, processing and inspection of printing plates, as well as monitoring and measurement.
1. Quality control at the design stage

pcb board


The quality management work in the design phase includes the following points.
(1) The person in charge of the project reviews the printed circuit board design documents and performs relevant review procedures to ensure that the design documents are valid. The printed circuit board made according to this document can meet the function and performance requirements of the equipment, otherwise the design is better and it is a waste paper pile.
(2) The person in charge of the project and the technicians should check the process requirements for the production of printed circuit boards to ensure the manufacturability of the printed circuit boards. Technical requirements can simply be posted directly on the design drawing, and the content can be written separately. No matter the process requirements are simple and complex, they must show correct, clear and neat process requirements. The reviewed technical requirements must meet the current production technology level, be economical, and cost-effective, and facilitate subsequent assembly, adjustment, testing and other projects.
(3) Standardizers review the design of printed circuit board test points, structural forms, dimensions, printed circuit layouts, pads, vias, text, etc., to ensure the testability and standardization of printed circuit boards, and try to meet national standards, The requirements of national military standards and industry standards.
2. Quality management of production and processing links
The quality management work in the production and processing links includes the following points.
(1) The quality department cooperates with the purchasing department to conduct on-site investigations and certify the qualification and production capacity of the printed circuit board manufacturer to ensure the manufacturer's ability to complete the production task.
(2) The designer re-examines the manufacturer's production drawings;. The design of printed circuit boards is often unsuccessful and requires multiple revisions. The manufacturer has multiple versions of processing drawings, and it is necessary to reconfirm the final processing drawings and confirm that the processed printed circuit boards meet the requirements of the final version.
(3) Pay attention to important processes in the production of printed circuit boards. Quality has a great influence on the performance and reliability of printed circuit boards, and quality management must be strengthened. Supervise and review the important process rules formulated by the manufacturer, such as etching, hole metalization and other processes, to ensure that the printed circuits and pads are free of burrs, gaps, and bridge defects, and the pathways are free of tumors and voids. The "stacking" of multi-layer printed circuit boards should also focus on quality control to ensure the thickness, bonding strength and positioning accuracy of the printed circuit boards. High-frequency boards and microstrip boards usually need to be gold-plated, and a professional gold-plating technical guide must be formulated to ensure the thickness and purity of the plating.
3. Quality control at the testing stage
The quality control work in the testing phase is strictly in accordance with the testing basis, using visual or professional tooling and instruments to monitor and measure printed circuit boards, and keep records. If there are special requirements, professional inspection rules should be formulated.