Glass ceramic dielectric compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorKumaran M. Nair
Life of this patent
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Abstract
The invention is directed to thick film glass ceramic dielectric compositions in which the dielectric is a mixture of amorphous aluminoborosilicate glass, which upon firing forms a single phase of ceramic crystals in a matrix of amorphous remainder glass, and a ceramic additive to minimize substrate bowing.
Claims5
A printable thick film dielectric composition consisting essentially of an admixture of finely divided particles of (a) an amorphous aluminoborosilicate glass which upon firing at Thick Film Processing Conditions forms a single crystalline phase of Ba.sub.2 AlSi.sub.2 O.sub.8 in a matrix of remainder glass;
- (b) 1-15% wt., basis total solids, of a ceramic material selected from Al.sub.2 O.sub.3, SiO.sub.2, complex oxides of Al.sub.2 O.sub.3 and SiO.sub.2, Si.sub.3 N.sub.4, AlN, complex nitrides Si.sub.3 N.sub.4 and AlN and mixtures thereof, the admixture being dispersed in (c) organic medium.
A printable thick film dielectric composition consisting essentially of an admixture of finely divided particles of (a) an amorphous aluminoborosilicate glass which upon firing at Thick Film Processing Conditions forms a single crystalline phase of an aluminate of Ba, Ca, Mg or Zn dispersed in a matrix of remainder glass;
- (b) 1-15% wt., basis total solids, of a ceramic material selected from Al.sub.2 O.sub.3, SiO.sub.2, complex oxides of Al.sub.2 O.sub.3 and SiO.sub.2, Si.sub.3 N.sub.4, AlN, complex nitrides Si.sub.3 N.sub.4 and AlN and mixtures thereof, the admixture being dispersed in (c) organic medium.
A printable thick film dielectric composition consisting essentially of an admixture of finely divided particles of (a) an amorphous aluminoborosilicate glass having the composition 30% SiO.sub.2, 8% TiO.sub.2, ZrO.sub.2 or mixtures thereof, 10% Al.sub.2 O.sub.3, 26% BaO, 10% ZnO, 6% CaO, 8% B.sub.2 O.sub.3, and 2% MgO;
- (b) 1-15% wt., basis total solids, of a ceramic material selected from Al.sub.2 O.sub.3, SiO.sub.2, complex oxides of Al.sub.2 O.sub.3 and SiO.sub.2, Si.sub.3 N.sub.4, AlN, complex nitrides of Si.sub.3 N.sub.4 and AlN and mixtures thereof, the admixture being dispersed in (c) organic medium.
A printable thick film dielectric composition consisting essentially of an admixture of finely divided particles of (a) an amorphous aluminoborosilicate glass having the composition 30% SiO.sub.2, 8% TiO.sub.2, ZrO.sub.2 or mixtures thereof, 10% Al.sub.2 O.sub.3, 10% BaO, 10% ZnO, 24% CaO and 8% B.sub.2 O.sub.3 ;
- (b) 1-15% wt., basis total solids, of a ceramic material selected from Al.sub.2 O.sub.3, SiO.sub.2, complex oxides of Al.sub.2 O.sub.3 and SiO.sub.2, Si.sub.3 N.sub.4, AlN, complex nitrides of Si.sub.3 N.sub.4 and AlN and mixtures thereof, the admixture being dispersed in (c) organic medium.
A printable thick film dielectric composition consisting essentially of an admixture of finely divided particles of (a) an amorphous aluminoborosilicate glass having the composition 30% SiO.sub.2, 8% TiO.sub.2, ZrO.sub.2 or mixtures therof, 12% Al.sub.2 O.sub.3, 12% BaO, 24% ZnO, 6% CaO and 8% B.sub.2 O.sub.3 ;
- (b) 1-15% wt., basis total solids, of a ceramic material selected from Al.sub.2 O.sub.3, SiO.sub.2, complex oxides of Al.sub.2 O.sub.3 and SiO.sub.2, Si.sub.3 N.sub.4, AlN, complex nitrides of Si.sub.3 N.sub.4 and AlN and mixtures thereof, the admixture being dispersed in (c) organic medium.
Dependencies are inferred from the claim text.