Patent ID: 7341966

Claim:
A borosilicate glass, wherein the CTE of the borosilicate glass is in a range from about 30×10 −7 /° C. to 45×10 −7 /° C., wherein the softening point of the borosilicate glass is in a range between about 600 and 1000° C., wherein the borosilicate glass has a percent weight loss of less than 10 milligrams/dm 2 according to an acid resistance test, wherein the borosilicate glass has a percent weight loss of less than 250 milligrams/dm 2 according to an alkali resistance test, and wherein the borosilicate glass comprises: SiO 2 in the range from about 68% to 73% by total composition weight; B 2 O 3 in the range from about 13% to 17% by total composition weight; Al 2 O 3 in the range from about 8% to 15% by total composition weight; and lithium oxide (Li 2 O) in the range from about 2% to 5% by total composition weight; wherein the borosilicate glass resists devitrification upon sintering without the addition of an inhibitor oxide, and wherein the borosilicate glass further includes one or more alkaline-earth oxides or rare-earth oxides, wherein the sum of the weight percentages of the one or more alkaline-earth oxides or rare-earth oxides is in a range between about 0.1% and 7% by total composition weight.