Low temperature sealant glass
AssigneeOwens-Illinois, Inc.
InventorPerry P. Pirooz
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Abstract
Sealing glass compositions are described which have low sealing temperature requirements and are particularly useful for sealing together the ceramic components used in microelectronic circuitry. The sealing glass compositions are characterized as low temperature, low expansion glasses of high chemical resistance especially against acid attack. Formed of a mixture of a lead borate base glass and beta eucryptite, the sealing glasses of the invention also possess high mechanical and thermal shock strength.
Claims7
A sealing glass composition consisting essentially of a vitreous lead borate glass in admixture with a sufficient amount of a crystalline beta eucryptite such that together they provide the desired coefficient of expansion for a strong, tightly heremetic, moisture-resistant seal, said beta eucryptite having an average lineral coefficient of thermal expansion of -123.+-.5.times.10.sup.-7 (0.degree.-300.degree. C.) in/in.degree.C.
Dependencies are inferred from the claim text.