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
428210, 428901, B32B 900
Patent
active
051398516
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: 3515625 (1970-06-01), Sedlak et al.
patent: 4135019 (1979-01-01), Kourtides et al.
patent: 4303431 (1981-12-01), Torobin
patent: 4880684 (1989-11-01), Boss et al.
Acocella John
Baise Arnold I.
Bates Richard A.
Casey Jon A.
Clarke David R.
Blecker Ira David
International Business Machines - Corporation
Lee Kam
Ryan Patrick J.
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