PCB product testing is a critical step in ensuring surface mount reliability. With the continuous development of PCB Circuit Boards and PCBA manufacturing industry and the increasing improvement of core technologies, the assembly density of shape memory alloys is also increasing, which not only brings about fine lines of circuit patterns, the fine pitch of patches, and non-visual characteristics of component pins.
The change also brings some challenges to the quality control of PCBA products. At the same time, in the production process of PCBA, how to judge the quality of circuit printed board is becoming more and more important.
The method of acceptance of PCB quality:
PCB circuit board quality acceptance should include design, process, and comprehensive approval. Generally, we should make samples first, test welding, seal samples and then supply in batches, which includes two aspects.
First: the electrical connection performance inspection, usually by the PCB manufacturer self-inspection, the test instruments used are:
① Optical board tester (on-off tester), which can measure the on and off of the connection, and whether the logical relationship of the multi-layer board including the metalized hole is correct;
②Graphic defect automatic optical tester can check the comprehensive performance of flexible aluminum PCB, including lines, characters, etc.
Second: Process inspection, including welding circuit board appearance, finish, flatness, clarity of characters, the resistivity of vias, electrical properties, heat resistance, solderability and other comprehensive properties to judge whether it can be accepted.