Impedance PCB final test eligibility criteria
Downstream operators usually require PCB manufacturers to do 100% electrical testing, so they will agree with PCB manufacturers on test conditions and test methods. Therefore, both parties will clearly define the following:
As automated test equipment becomes part of the overall electronics assembly process, DFT must include not only traditional hardware usage issues, but also knowledge of test equipment diagnostic capabilities.
The DFT team should be aware of the existing testing strategy. As OEMs turn to relying on more and more CMs, the equipment used varies from plant to plant. Without a clear understanding of the manufacturer's process, too many or too few tests may be used. Existing test methods include: