What is the reliability tetsing of a printed circuit board? And what is the procedure??
Monday, October 19th, 2009 at
11:29 pm
vibration, heat, flex tests and is there something else??
Filed under: Circuit Boards
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By reliability you might mean two things and I am not sure which.
As part of production there are typically quality tests that verify that the empty or stuffed board has all of its components and its connections done correctly. For small runs this could be done by eye or visually with a microscope to make sure that Vias are properly connected and that mounting pads are not of the specified required size. The stuffed boards could be checked with meters and compared to the drawings for component location and value.
In a large run pricey fixtures that have probes on each key location would be vacuum clamped onto each board and a computer check for component values and voltages would be done automatically.
As far as the overall reliability of a board with a specific design there are heat oven cycling tests, vibration tests, flex tests, component-pull test, under and over voltage tests, high-pot tests, and long term operating tests. There also can be destructive tests in which board details are checked with microscopes, thermal cameras and x-rays. .