Patent US3917487A successfully refreshed from Google Patents.
US3917487A
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Cadmium-containing silver conductor compositions
Assignee: EIDP Inc
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Filing: 1973-12-28
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Granted: 1975-11-04
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Expires: 1993-12-28
Abstract
Abstract Improved silver conductor compositions comprising, in addition to silver and inorganic binder (such as glass and Bi2O3), cadmium, whereby the solder leach resistance of resultant conductors is enhanced. Also dispersions thereof in inert vehicle and ceramic substrates having the conductor composition in adherent relationship therewith.
Inventors
- 👤 Oliver Alton Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:27
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/24; H; H01; H01B; H01B1/00; H01B1/14; H01B1/16; H05; H05K; H05K1/00; H05K1/02; H05K1/09; H05K1/092
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
IN A POWDER COMPOSITION,FOR PRODUCING CONDUCTIVE PATTERNS ON A DIELECTRIC SUBSTRATE COMPRISING FINELY DIVIDED SILVER AND FINELY DIVIDED INORGANIC BINDER, THE IMPROVEMENT COMPRISING FINELY DIVIDED ELEMENTAL CADMIUM POWDER IN ANL AMOUNT EFFECTIVE TO INCREASE THE SOLDER LEACH RESISTANCE OF CONDUCTORS THEREOF.
Claim 2
Dependent Claim
41 words
IN A POWDER COMPOSITION,FOR PRODUCING CONDUCTIVE PATTERNS ON A DIELECTRIC SUBSTRATE COMPRISING FINELY DIVIDED SILVER AND FINELY DIVIDED INORGANIC BINDER, THE IMPROVEMENT COMPRISING FINELY DIVIDED ELEMENTAL CADMIUM POWDER IN ANL AMOUNT EFFECTIVE TO INCREASE THE SOLDER LEACH RESISTANCE OF CONDUCTORS THEREOF.
Claim 3
Dependent Claim
22 words
Conductor compositions according to claim 1 wherein the amount of cadmium is 2-20 percent by weight, based on the weight of silver.
Claim 4
Dependent Claim
11 words
Conductor compositions according to claim 1 dispersed in an inert vehicle.
Claim 5
Dependent Claim
11 words
Conductor compositions according to claim 2 dispersed in an inert vehicle.
Claim 6
Dependent Claim
14 words
A ceramic dielectric substrate having the composition of claim 1 in adherent relationship therewith.
Claim 7
Dependent Claim
14 words
A ceramic dielectric substrate having the composition of claim 2 in adherent relationship therewith.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |