Silver-glass paste for attachment of silicon die to ceramic subs

Details Silver-glass paste for attachment of silicon die to ceramic subs Silver-glass paste for attachment of silicon die to ceramic subs

1986-03-10

1987-01-13

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 119, 252514, C03C 310

Patent

active

046362541

ABSTRACT:
Silver flake and lead borate glass frit are suspended in a liquid organic vehicle of resin and solvent. The silver flakes are present in two different size ranges. The plate is applied between the silicon die and the substrate and is oven fired to provide a bond that accommodates the different coefficients of thermal expansion of the silicon and ceramic substrate. The smaller silver particles improve the sintering of the silver and glass and thereby increase the bond strength while the larger silver particles minimize undersirable shrinkage and cracking of the resultant bond. Silver oxide particles or a special solvent mixture are also used in the paste.

REFERENCES:
patent: 3497774 (1970-02-01), Hornberger et al.
patent: 4401767 (1983-08-01), Dietz et al.
patent: 4435214 (1984-03-01), Ehrreich
patent: 4436785 (1984-03-01), Dietz et al.
patent: 4459166 (1984-07-01), Dietz et al.

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