US3159462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor and secured metal base and method of making the same
Assignee: Infineon Technologies Americas Corp
•
Filing: 1962-09-24
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Granted: 1964-12-01
•
Expires: 1982-09-24
Abstract
No abstract record available.
Inventors
- 👤 Kadelburg Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:37
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/30; H10W72/071; H10W72/073; H10W72/07331; H10W72/07336; H10W72/351; H10W72/352; Y; Y10; Y10S; Y10S228/00; Y10S228/903; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/12493; Y10T428/12528; Y10T428/12674; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284; Y10T428/12861; Y10T428/12889; Y10T428/12944
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A SEMICONDUCTOR ELEMENT WHICH COMPRISES: (A) A SILICON SEMICONDUCTOR WAFER; (B) A COPPER BASE OF SAID WAFER; (C) A TUNGSTEN WAFER FOR SECURING THE SILICON WAFER TO THE COPPER BASE, SAID TUNGSTEN WAFER BEING NICKELPLATED AND BEARING A COATING CONSTITUTED OF A GOLDBORON ALLOY THEREOVER; AND (D) A GOLD-GERMANIUM ALLOY SOLDER BONDING THE SILICON WAFER TO THE GOLD-BORON ALLOY COATING ON ONE SIDE OF THE TUNGSTEN WAFER, AND BONDING THE GOLD-BORON ALLOY COATING ON THE OPPOSITE SIDE OF THE TUNGSTEN WAFER TO THE COPPER BASE.
Claim 2
Dependent Claim
85 words
A SEMICONDUCTOR ELEMENT WHICH COMPRISES: (A) A SILICON SEMICONDUCTOR WAFER; (B) A COPPER BASE OF SAID WAFER; (C) A TUNGSTEN WAFER FOR SECURING THE SILICON WAFER TO THE COPPER BASE, SAID TUNGSTEN WAFER BEING NICKELPLATED AND BEARING A COATING CONSTITUTED OF A GOLDBORON ALLOY THEREOVER; AND (D) A GOLD-GERMANIUM ALLOY SOLDER BONDING THE SILICON WAFER TO THE GOLD-BORON ALLOY COATING ON ONE SIDE OF THE TUNGSTEN WAFER, AND BONDING THE GOLD-BORON ALLOY COATING ON THE OPPOSITE SIDE OF THE TUNGSTEN WAFER TO THE COPPER BASE.
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) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |