Stock material or miscellaneous articles – Composite – Of quartz or glass
Patent
1986-10-28
1987-12-29
Kittle, John E.
Stock material or miscellaneous articles
Composite
Of quartz or glass
428432, 174 52S, 501 32, 357 74, B32B 1706
Patent
active
047160829
ABSTRACT:
A duplex glass preform for forming hermetic glass-to-metal seals. The duplex glass preform comprises a glass infrastructure or matrix having at least one end thereof modified by the selective distribution therein of ceramic particles. The ceramic particles are selectively distributed to form a ceramic density gradient having the largest concentration of ceramic particles at the surface and gradually decreasing with depth. The duplex glass preform of the present invention has utility in forming glass-to-metal seals in hybrid metal packages containing microcircuit chips.
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Ahearn John E.
Frates Raymond A.
Girard Dennis
Koepke Richard A.
Manon C. Dodd
Isotronics, Inc.
Kittle John E.
Owens Terry J.
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