Patent US4214904A successfully refreshed from Google Patents.
US4214904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gold-tin-silicon alloy for brazing silicon to metal
Assignee: United States Department of the Air Force
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Filing: 1978-12-12
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Granted: 1980-07-29
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Expires: 1998-12-12
Abstract
Abstract An alloy for brazing a silicon die to a gold-plate kovar header consists essentially of 19 to 21 weight percent tin and 0.6 to 0.8 weight percent silicon with the balance being gold. The alloy melts at a temperature below 200 DEG C. which is substantially lower than that of the conventional gold-silicon eutectic alloy.
Inventors
- 👤 Donald R. Kitchen
- 👤 Loren A. Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:52
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/20; H10W70/24; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3013; H10W20/00; H10W20/40; H10W72/00; H10W72/071; H10W72/073; H10W72/07331; H10W72/07336; H10W72/30; H10W72/351; H10W72/352; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12674
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
A braze alloy for brazing silicon to a metal substrate, said alloy consisting essentially of about 19 to 21 weight percent tin and about 0.6 to 0.8 weight precent silicon, the balance being gold.
Claim 2
Dependent Claim
34 words
A braze alloy for brazing silicon to a metal substrate, said alloy consisting essentially of about 19 to 21 weight percent tin and about 0.6 to 0.8 weight precent silicon, the balance being gold.
Claim 3
Dependent Claim
24 words
The braze alloy according to claim 1 which consists essentially of 20 weight percent tin, 0.6 weight percent silicon, and 79.4 weight percent gold.
Claim 4
Dependent Claim
39 words
An article of manufacture comprising a silicon die bonded to a metal substrate with a braze alloy consisting essentially of about 19 to 21 weight percent tin and about 0.6 to 0.8 weight percent silicon, the balance being gold.
Claim 5
Dependent Claim
39 words
An article of manufacture comprising a silicon die bonded to a metal substrate with a braze alloy consisting essentially of about 19 to 21 weight percent tin and about 0.6 to 0.8 weight percent silicon, the balance being gold.
Claim 6
Dependent Claim
29 words
The article of manufacture according to claim 3 in which the braze alloy consists essentially of 20 weight percent tin, 0.6 weight percent silicon, and 79.4 weight percent gold.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |