US4466830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thick film gold metallization composition
Assignee: EIDP Inc
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Filing: 1982-11-19
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Granted: 1984-08-21
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Expires: 2002-11-19
Abstract
Abstract Paste composition for electrical terminal contact metallization containing 65 to 97% by weight gold and 3 to 25% by weight cadmium/antimony alloy dispersed in an inert liquid vehicle.
Inventors
- 👤 Joseph R. Rellick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:24
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/22; H05K3/24; H05K3/245; H05K3/247; H05K3/248; C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; C23C24/106; H01; H01B; H01B1/00; H01B1/02; H05K3/02; H05K3/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
Thick film gold composition suitable for electrical terminal contact metallization comprising: 65 to 97% by weight of gold particles, 3 to 25% by weight of particles of an alloy of cadmium and antimony having an antimony content of 25-80% by weight, 0-20% by weight copper particles and 0-30% by weight silver particles, the weights based on the total inorganic solids present, the solids being dispersed in a vehicle in a concentration sufficient to make a printable paste.
Claim 2
Dependent Claim
77 words
Thick film gold composition suitable for electrical terminal contact metallization comprising: 65 to 97% by weight of gold particles, 3 to 25% by weight of particles of an alloy of cadmium and antimony having an antimony content of 25-80% by weight, 0-20% by weight copper particles and 0-30% by weight silver particles, the weights based on the total inorganic solids present, the solids being dispersed in a vehicle in a concentration sufficient to make a printable paste.
Claim 3
Dependent Claim
27 words
A composition according to claim 1 wherein the gold particle content is 75 to 95% by weight and the cadmium/antimony content is 5 to 20% by weight.
Claim 4
Dependent Claim
27 words
A composition according to claim 1 wherein the gold particle content is 80 to 90% by weight and the cadmium/antimony content is 7 to 15% by weight.
Claim 5
Dependent Claim
23 words
A screen-printable paste comprising 60-95% by weight of the inorganic solids of claim 1 and 5 to 40% by weight of the vehicle.
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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |