What are the Commonly used Inspection Methods for PCB?
In order to ensure the quality of PCB, a variety of detection methods will be used in the production process to detect possible problems or defects. What are the commonly used detection methods for PCB? 1. Manual V isual I nspection The inspector will use a magnifying glass or calibrated microscope to check whether the PCB is qualified or not. Generally, it is to check whether there are obvious defects in the appearance PCB, pad, solder mask ink, and outer layer traces. 2. O nline T est ing By inspecting electrical properties to find defects and testing analog, digital and mixed-signal components to ensure they meet specifications, bed of needles and flying probe testers are used for testing. 3. F unction al T est The general functional test is the last step before the final manufacturing, mainly to conduct a comprehensive test on the functional modules of the PCB to confirm t...