Screen Tests and Product Acceptance

Some customers require that a series of screen (nondestructive) tests be applied to the final product before delivery. These tests may consist simply of a few temperature cycles or a regimen of sequential mechanical and electrical tests as for Classes H and K of MIL-PRF-38534 for hybrid microcircuits. The sequence of tests for Class H microcircuits consists ofthe following  

For Class K (space-grade), the additional tests of nondestmctive wire bond pull, FIND, and radiography are imposed. 

Screen tests assure the reliability of the entire electronic product of which the adhesive joints are apart. 

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