US3597658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High current semiconductor device employing a zinc-coated aluminum substrate
Assignee: RCA Corp
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Filing: 1969-11-26
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Granted: 1971-08-03
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Expires: 1989-11-26
Abstract
Abstract The device structure includes a zinc layer on an aluminum substrate, and a layer of nickel on the zinc layer. A pedestal member which has a semiconductor device mounted thereon, is joined to the nickel with a brazing material which has a melting temperature below that of the aluminum substrate, and wets well to nickel.
Inventors
- 👤 John Rivera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:23
CPC Classifications
H; H10; H10W; H10W72/00; B; B23; B23K; B23K35/00; B23K35/001; B23K35/002; H10W70/00; H10W70/20; H10W70/24; B23K2035/008; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/933; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12396; Y10T428/12493; Y10T428/12528; Y10T428/12535; Y10T428/12611; Y10T428/12639; Y10T428/12736; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12806; Y10T428/12826; Y10T428/12861; Y10T428/12889; Y10T428/12951
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
A structure according to claim 1, wherein said pedestal member comprises a material selected from a group consisting of molybdenum, beryllia, and alumina, coated with nickel.
Claim 2
Dependent Claim
25 words
A structure according to claim 1, wherein said brazing material consists essentially of 38 percent gold, 17 percent germanium, and 45 percent silver, by weight.
Claim 3
Dependent Claim
28 words
A structure according to claim 1, in which said semiconductor device is a transistor which is soldered to the second one of the surfaces of said pedestal member.
References Cited (Backward Citations)
US2320998A
Cited
US2473888A
Cited
GB1015560A
Cited
US3283224A
Cited
US3486892A
Cited
US3512027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |