Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1990-03-30
1992-08-18
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428901, 428210, B32B 900
Patent
active
051398524
ABSTRACT:
The cracking experienced during thermal cycling of metal:dielectric semiconductor packages results from a mismatch in thermal co-efficients of expansion. The non-hermeticity associated with such cracking can be addressed by backfilling the permeable cracks with a flexible material. Uniform gaps between the metal and dielectric materials can similarly be filled with flexible materials to provide stress relief, bulk compressibility and strength to the package. Furthermore, a permeable, skeletal dielectric can be fabricated as a fired, multilayer structure having sintered metallurgy and subsequently infused with a flexible, temperature-stable material to provide hermeticity and strength.
REFERENCES:
patent: 4861646 (1989-08-01), Barringer et al.
patent: 4880684 (1989-11-01), Boss et al.
Baise Arnold I.
Bryant Ray M.
Casey Jon A.
Dam Allen J.
Dunkel Werner E.
Blecker Ira David
International Business Machines - Corporation
Lee Kam F.
Ryan Patrick J.
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