Patent ID: 7439202
Filing Date: 2008-10-21
Classification: C03C,C04B,H05K,Y10T

Abstract:
1. A glass ceramic composition comprising: a first ceramic powder mainly composed of forsterite; a second ceramic powder containing at least one ceramic powder selected from the group consisting of a ceramic powder mainly composed of calcium titanate, a ceramic powder mainly composed of strontium titanate, and a ceramic powder mainly composed of titanium oxide; a third ceramic powder mainly composed of barium zirconate; and about 3 percent by weight or more of a borosilicate glass powder containing about 3 to 15 percent by weight of lithium calculated as Li wherein the borosilicate glass powder contains at least about 2 percent by weight of an additive selected from the group consisting of calcium oxide, barium oxide, strontium oxide and mixtures thereof, calculated as CaO, BaO and SrO, respectively, and wherein the upper limit of the calcium oxide content of the borosilicate glass powder is about 15 percent by weight, the upper limit of the barium oxide content of the borosilicate glass powder is about 25 percent by weight, and the upper limit of the strontium oxide content of the borosilicate glass powder is about 25 percent by weight.