US3300340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bonded contacts for gold-impregnated semiconductor devices
Assignee: TDK Micronas GmbH
•
Filing: 1963-02-06
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Granted: 1967-01-24
•
Expires: 1983-02-06
Abstract
No abstract record available.
Inventors
- 👤 Nicola A Calandrello
- 👤 Hill John
- 👤 Royan John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:38
CPC Classifications
H; H10; H10W; H10W72/00; H10W72/90; H10P; H10P95/00; H10W72/20; H10W76/00; H10W76/10; H10W76/12; H10W76/161; H10W72/071; H10W72/075; H10W72/07551; H10W72/07554; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR FORMING A CONTACT TO A SILICON SEMICONDUCTOR WAFER WHOSE MINORITY CARRIER LIFETIME HAS BEEN REDUCED BY IMPREGNATION WITH GOLD, COMPRISING THE STEPS OF: APPLYING A COATING OF GOLD TO A SURFACE OF SAID WAFER; APPLYING A COATING OF A CONDUCTIVE METAL ATOP SAID GOLD COATING, SAID METAL BEING CAPABLE OF ALLOYING WITH GOLD AT TEMPERATURES WITHIN A PREDETERMINED RANGE, SAID METAL EXHIBITING SUBSTANTIAL GETTERING OF GOLD IN SILICON AT TEMPERATURES IN EXCESS OF A PARTICULAR THRESHOLD VALUE; AND SINTERING SAID COATINGS TOGETHER AT A TEMPERATURE WITHIN SAID PREDETERMINED RANGE AND NOT EXCEEDING SAID THRESHOLD VALUE THEREBY TO PRECLUDE GETTERING OF GOLD
Claim 2
Independent Claim
104 words
A METHOD FOR FORMING A CONTACT TO A SILICON SEMICONDUCTOR WAFER WHOSE MINORITY CARRIER LIFETIME HAS BEEN REDUCED BY IMPREGNATION WITH GOLD, COMPRISING THE STEPS OF: APPLYING A COATING OF GOLD TO A SURFACE OF SAID WAFER; APPLYING A COATING OF A CONDUCTIVE METAL ATOP SAID GOLD COATING, SAID METAL BEING CAPABLE OF ALLOYING WITH GOLD AT TEMPERATURES WITHIN A PREDETERMINED RANGE, SAID METAL EXHIBITING SUBSTANTIAL GETTERING OF GOLD IN SILICON AT TEMPERATURES IN EXCESS OF A PARTICULAR THRESHOLD VALUE; AND SINTERING SAID COATINGS TOGETHER AT A TEMPERATURE WITHIN SAID PREDETERMINED RANGE AND NOT EXCEEDING SAID THRESHOLD VALUE THEREBY TO PRECLUDE GETTERING OF GOLD
References Cited (Backward Citations)
US2736847A
Cited
US2793420A
Cited
US3064167A
Cited
US2989578A
Cited
US2957112A
Cited
US3028663A
Cited
US2964689A
Cited
US3067485A
Cited
US2989650A
Cited
US3196325A
Cited
US3171067A
Cited
US3214654A
Cited
US3169304A
Cited
US3132408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |