Aluminum borate devitrification inhibitor in low dielectric borosilicate glass
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United States of America Patent
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Dec 14, 1993
Grant Date -
N/A
app pub date -
Sep 23, 1992
filing date -
Sep 23, 1992
priority date (Note) -
Expired
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Abstract
A ceramic composition for forming a ceramic dielectric body having a dielectric constant of less than about 5.5 and a TCE of less than about 3.5 ppm/.degree.C. The composition comprises a mixture of finely divided particles of 20-80 vol. % borosilicate glass and 20-80 vol. % of Al.sub.x B.sub.y O.sub.z wherein x is in the range of 4 to 22, y is in the range of 2 to 5, and z is in the range of 9 to 36. The Al.sub.x B.sub.y O.sub.z inhibits 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.
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