Method for producing materials for co-sintering
AssigneeCeramics Process Systems Corporation
InventorsEric A. Barringer, Sheldon I. Lieberman, Mark S. Schmidt, James D. Hodge
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Abstract
This invention relates to glass-ceramic packages for integrated circuits containing multi-layer, interconnected thick film wiring patterns obtained by co-sintering a glass-ceramic composite and copper, silver, palladium or gold based conductors at temperatures not exceeding about 1000.degree. C. The dielectric systems disclosed herein contains composites of borosilicate glasses and crystalline fillers which are fabricated by either mixing glass frit and the filler or by a sol-gel coating process.
Claims22
A method of producing composite ceramic particles having a relatively low sintering temperature, comprising:
- (a) preparing a reagent solution including glassy compounds consisting essentially of calcium oxide, silicon dioxide, boron oxide, and optionally at least one of magnesium oxide and aluminum oxide;
- (b) mixing into the reagent solution a suspension of ceramic particles selected from the group consisting of alumina, spinel, cordierite, mullite, forsterite, quartz, spodumene, eucryptite, and mixtures thereof, to form a mixture;
- and
- (c) adding to the mixture of precipitating agent so that the glassy compounds precipitate onto and coat the ceramic particles, forming composite ceramic particles.
A method of producing a ceramic substrate sinterable at a relatively low temperature, comprising:
- (a) preparing a reagent solution including glassy compounds consisting essentially of calcium oxide, silicon dioxide, boron oxide, and optionally including at least one of magnesium
- (b) mixing into the reagent solution a suspension of ceramic oxide and aluminum oxide;
- particles selected form the group consisting of alumina, spinel, cordierite, forsterite, quartz, spodumene, eucryptite, and mixtures thereof, to form a mixture;
- (c) adding to the mixture a precipitating agent so that the glassy compounds precipitate onto and coat the ceramic particles;
- (d) separating the coated particles from the liquid;
- (e) drying the separated coated particles;
- (f) forming the dried coated particles into a green compact;
- and
- (g) firing the green compact at a relatively low sintering temperature to produce a ceramic substrate.
Dependencies are inferred from the claim text.