Hermeticity and Particle Impact Noise Test Techniques

Factors to be considered in selecting a hermetic seal test technique are reviewed and discussed. These include package size and condition as well as the objectives of the testing. Also factors which may contribute to result error and wrong conclusions are examined. Why they cause error and the type of results one should be suspicious of are discussed. The effects of shock levels, vibration level and frequency on particle detection using the impact noise technique are reviewed. Also methods of attaching devices to the transducer are discussed. Positive actions that can be taken to improve the results of hermeticity and particle detection test are also pointed out.