Compositions: ceramic – Ceramic compositions – Devitrified glass-ceramics
Patent
1987-01-16
1988-08-16
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Devitrified glass-ceramics
501 66, 501 69, 501 70, 501153, C03C 1000
Patent
active
047644869
ABSTRACT:
A sintered glass-powder product of a glass ceramic body, consisting essentially of: SiO.sub.2, Al.sub.2 O.sub.3, MgO, and B.sub.2 O.sub.3, and sintered at a temperature below 900.degree. C. The product includes a microstructure of alpha-cordierite and magnesium aluminum silicate (MgO.Al.sub.2 O.sub.3.4SiO.sub.2) homogeneously dispersed in the glass ceramic body. When the sintered glass-powder product is used in the form of a green sheet for fabricating, in particular, a multilayer wiring substrate or the like, the required sintering temperature for fabricating the substrate can be remarkably reduced so as to be well-matched in thermal characteristics with such wiring conductors as gold, silver, copper, or the like, and even with a relatively large semiconductor chip because the thermal expansion coefficient of the sintered product is close to that of silicon semiconductor.
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Ishihara Masayuki
Makio Keizo
Dixon Jr. William R.
Griffis Andrew
Matsushita Electric & Works Ltd.
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