Solder glass with refractory filler

Details Solder glass with refractory filler Solder glass with refractory filler

1974-07-30

1976-05-04

Douglas, Winston A.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 54, C03C 304

Patent

active

039544869

ABSTRACT:
Disclosed is a physical blend of particulate lead borate sealing glass and particulate refractory filler for use in forming thermal fusion seals for workpieces having a lower coefficient of thermal expansion than the sealing glass. The particulate refractory filler has a particle size diameter in excess of about 37 microns (i.e. plus 400 U.S. Sieve) to lower the expansion while maintaining adequate flow during fusion. The blend is especially useful as a package sealant for electronic components.

REFERENCES:
patent: 2863782 (1958-12-01), Eubank
patent: 3250631 (1966-05-01), Lusher
patent: 3258350 (1966-06-01), Martin
patent: 3275358 (1966-09-01), Shonebarger
patent: 3425817 (1969-02-01), Ikeda
patent: 3454408 (1969-02-01), Busdiecker
patent: 3778242 (1973-12-01), Francel

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