Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1989-03-27
1990-07-03
Ryan, Patrick
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428210, 428457, 428461, 428901, B32B 900
Patent
active
049390228
ABSTRACT:
In the fabrication of various hybrid devices, it is the practice to provide thick film conductors of two different compositions, namely, a high palladium content silver-palladium film and an essentially pure silver film. The silver-palladium films are used because of their excellent physical and chemical properties, but are relatively expensive. The silver-based films do not have comparably good properties (with the exception of low electrical resistivity), but are less expensive than the silver-palladium films and are used in substitution therefore on less "demanding" areas of the device. However, the two films interact when in contact, and discontinuities or open circuits can occur as a result. The present invention provides a novel silver-based conductor film including a small percentage of palladium and one or both of aluminum oxide and silicon dioxide. These additives function to inhibit interaction between the novel silver-based films and the known silver-palladium films, hence avoiding the occurrence of discontinuities, while still allowing low electrical resistance bonding between the two films.
REFERENCES:
patent: 4148761 (1979-04-01), Kazmierowicz
patent: 4207369 (1980-06-01), Kazmierowicz
patent: 4415624 (1983-11-01), Prabhu et al.
patent: 4536435 (1985-08-01), Utsumi et al.
patent: 4659611 (1987-04-01), Iwase et al.
patent: 4776978 (1988-10-01), Herron et al.
Delco Electronics Corporation
Ryan Patrick
Wallace Robert J.
LandOfFree
Electrical conductors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electrical conductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical conductors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1890037