Devitrification inhibitor in low dielectric borosilicate glass
AssigneeAluminum Company of America
InventorsJau-Ho Jean, Tapan K. Gupta
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Abstract
A ceramic composition for forming ceramic dielectric body having a dielectric constant of less than about 5.5 and a TCE of less than about 5.0 ppm/.degree.C. The composition comprises a mixture of finely divided particles of 10-90 vol. % borosilicate glass and 10-90 vol. % of a material selected from the group consisting of Ga.sub.2 O.sub.3, Ga.sub.2 SiO.sub.5, Ga.sub.2 TiO.sub.5, GaAs, GaPO.sub.4 and any gallium-contained compounds to inhibit the formation of crystalline forms of silica. The composition can be used with a polymeric binder to produce an unfired green tape which is co-fireable with high conductivity metallurgies such as gold, silver and silver/palladium.
Claims12
A ceramic composition comprising a mixture of ceramic particles consisting essentially of:
- (a) 60-90 vol. % borosilicate glass;
- and
- (b) 10-40 vol. % of a gallium containing material.
A castable ceramic composition consisting essentially of:
- (a) 70-85 wt. % of a mixture consisting essentially of 60-90 vol. % borosilicate glass and 10-40 vol. % of a gallium-containing material;
- and
- (b) 15-30 wt. % of an organic medium comprised of a polymeric binder dissolved in an organic solvent.
A ceramic composition for forming a ceramic dielectric body having a dielectric constant of less than about 5.5, said composition consisting essentially of 10-40 vol. % of a gallium containing material and 60-90% borosilicate glass.
A method of making a ceramic dielectric body having a dielectric constant of less than about 5.5, consisting essentially of the steps of:
- (a) providing a mixture consisting essentially of finely divided particles consisting essentially of 60-90 vol. % borosilicate glass, and 10-40 vol. % of a gallium containing material;
- and
- (b) sintering the mixture in air to a temperature not greater than about 1000.degree. C.
Dependencies are inferred from the claim text.