in impact test setup are gratefully acknowledged. Many of the items compared in this report were commercial items that were not developed or manufactured to meet Government specifications, to withstand the tests to which they were subjected, or to operate as applied during this study. Any failure to meet the objectives of this study is no reflection on any of the commercial items discussed herein or on any manufacturer. This technical report has been reviewed and is approved.

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Nonuniform ac magnetostriction in metallic glass: Model and measurement using a fiberoptic strain gauge (abstract)

circuits. Samples consisted of four SRAM chips mounted on fine line PWBs (MCM-L technology). A complete design of experiments (DOE) matrix included two PWB sources, three die attachment adhesives, one moisture passivation coating (plasma enhanced, chemical vapor deposited silicon nitride), and two encapsulants (a silicone gel and an epoxy glob-top material). DOE was also employed to set up the environmental test scheme using tests selected from MIL-STD-883, and HAST. A set of conventional thin film hybrid circuit samples packaged in hermetic ceramic packages was included in the environmental test scheme as a control. Failure analyses of test samples and conclusions on performance of adhesives and protective coatings are presented.