Silver compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorSanford Morton Marcus
Life of this patent
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Abstract
Conductive silver compositions useful for producing in a single application step solderable metal coatings on titanate bodies especially semiconducting ceramic titanate bodies, the silver compositions comprising specific amounts of finely divided silver; boron, Ni.sub.3 B, and/or certain nickel boride/phosphides; and a binder which is glass and/or PbF.sub.2. These inorganic solids are dispersed in an inert liquid vehicle. Also these compositions fired on a dielectric substrate.
Claims15
A conductive silver composition useful for producing in a single application step solderable metal coatings on ceramic titanate bodies, said silver compositions being a mixture of finely divided inorganic particles dispersed in a vehicle, the inorganic particles consisting essentially of about, by weight,
- (A) (1) 75-98% silver
- (2) 2-6% boron, and
- (3) 1-22% glass, PbF.sub.2, or mixtures thereof, or
- (B) (1) 40-70% silver,
- (2) 25-60% Ni.sub.3 B.sub.1-x P.sub.x wherein x is in the approximate range 0-0.6, and
- (3) 3-22% glass, PbF.sub.2, or mixtures thereof, or
- (C) mixtures of (A) and (B).
Dependencies are inferred from the claim text.