Seal structure of ceramics and low expansion metallic material

Details Seal structure of ceramics and low expansion metallic material Seal structure of ceramics and low expansion metallic material

1977-12-20

1979-01-16

Robinson, Ellis

Stock material or miscellaneous articles

Composite

Of quartz or glass

428428, 428433, 428471, 428472, 428901, B32B 1706, B32B 1504

Patent

active

041350383

ABSTRACT:
A seal structure consisting of a ceramic base and a low-expansion metallic material bonded by a low-melting glass particularly useful for large scale integrated circuit (LSI) applications is disclosed. When using a high alumina ceramics containing 65 to 92% of Al.sub.2 O.sub.3 by weight as a ceramic, the thermal coefficients of expansion are best matched while maintaining a comparatively low dielectric constant by using a composition consisting of 60 to 85% lead borate glass, 10 to 30% .beta.-eucryptite and 0.5 to 15% zircon as a low-melting sealing glass.

REFERENCES:
patent: 2458748 (1949-01-01), Stuparoff
patent: 3225132 (1965-12-01), Baas
patent: 3250631 (1966-05-01), Lusher
patent: 3258350 (1966-06-01), Martin
patent: 3404027 (1968-10-01), Kosiorek
patent: 3560327 (1971-02-01), Mills
patent: 3676204 (1972-07-01), Eppler
patent: 3679464 (1972-07-01), Eppler
patent: 3804666 (1974-04-01), Eppler
patent: 3846222 (1974-11-01), Dietz
patent: 3922471 (1975-11-01), Ellis
patent: 4002799 (1977-01-01), Dumesnill

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