Sealing glass compositions

Details Sealing glass compositions Sealing glass compositions

1989-09-15

1991-05-07

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

428426, 428432, 428433, 428434, 501 15, 501 17, 501 32, 501 41, 501 44, 501 46, C03C 312, C03C 321, C03C 824, C03C 1400

Patent

active

050133608

ABSTRACT:
Fluid, stable glasses useful for low-temperature sealing applications are made by adding jointly bismuth oxide, zinc oxide, phosphorus pentoxide, titania and/or zirconium oxide to the lead oxide vanadium oxide binary. The phosphorus pentoxide may be replaced partially or entirely with niobium pentoxide and/or tantalum oxide.
Sealing glass compositions comprising these low-melting lead-vanadia glasses in powder form and refractory fillers of lower thermal expansion for use in hermetically sealing semiconductor devices in ceramic packages are disclosed. Group V metal oxides, particularly niobium-containing oxides, are preferred fillers. Silver metal is a preferred filler for making die-attach compositions.

REFERENCES:
patent: 3408212 (1968-10-01), Dumesnil
patent: 3454408 (1969-07-01), Busdiecker
patent: 3650778 (1972-03-01), Dumesnil et al.
patent: 3837866 (1974-09-01), Malmendier et al.
patent: 4186023 (1980-01-01), Dumesmil et al.
patent: 4743302 (1988-05-01), Dumesmil et al.

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