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Toward Interpreting Failure in Sintered-Silver Interconnection Systems...

by Max C Modugno, Andrew A Wereszczak, Shirley B Waters
Publication Type
Conference Paper
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Conference Name
Conference Location
Albuquerque, New Mexico, United States of America
Conference Date

The mechanical strength and subsequent reliability of a sintered-silver interconnection “system” is a function of numerous independent parameters. That “system” is still undergoing process development. Most of those parameters (e.g., choice of plating) are arguably and unfortunately taken for granted and are independent of the silver’s cohesive strength. To explore such effects, shear strength testing and failure analyses were completed on a simple, mock sintered-silver interconnection system consisting of bonding two DBC ceramic substrates. Silver and gold platings were part of the test matrix, as was pre-drying strategies, and the consideration of stencil-printing vs. screen-printing. Shear strength of sintered-silver interconnect systems was found to be was insensitive to the choice of plating, drying practice, and printing method provided careful and consistent processing of the sintered-silver are practiced. But if the service stress in sintered silver interconnect systems is anticipated to exceed ~ 60 MPa, then the system will likely fail.