US3386867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for providing electrical contacts to a wafer of gaas
Assignee: International Business Machines Corp
•
Filing: 1965-09-22
•
Granted: 1968-06-04
•
Expires: 1985-09-22
Abstract
No abstract record available.
Inventors
- 👤 John L Staples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C14/58; C23C14/5806; C23C26/00; H; H10; H10N; H10N80/00; H10N80/01; H10P; H10P95/00; Y; Y10; Y10S; Y10S438/00; Y10S438/90; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12528
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD FOR PROVIDING ELECTRICAL CONTACTS TO A WAFER OF GAAS COMPRISING THE STEPS OF MAINTAINING SAID WAFER IN AN EVACUATED CHAMBER, VAPOR DEPOSITING A EUTECTIC MIXTURE OF GOLD-GERMANIUM ONTO SAID WAFER, VAPOR DEPOSITING A METAL ONTO SAID EUTECTIC MIXTURE, SAID METAL HAVING A HIGHER MELTING POINT THAN SAID EUTECTIC MIXTURE AND A LOW SOLUBILITY THEREIN, AND ALLOYING SAID GOLD-GERMANIUM TO SAID WAFER.
Claim 2
Independent Claim
63 words
A METHOD FOR PROVIDING ELECTRICAL CONTACTS TO A WAFER OF GAAS COMPRISING THE STEPS OF MAINTAINING SAID WAFER IN AN EVACUATED CHAMBER, VAPOR DEPOSITING A EUTECTIC MIXTURE OF GOLD-GERMANIUM ONTO SAID WAFER, VAPOR DEPOSITING A METAL ONTO SAID EUTECTIC MIXTURE, SAID METAL HAVING A HIGHER MELTING POINT THAN SAID EUTECTIC MIXTURE AND A LOW SOLUBILITY THEREIN, AND ALLOYING SAID GOLD-GERMANIUM TO SAID WAFER.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |