US3284252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing semiconductor systems comprising cadmium chalcogenide semiconductors
Assignee: US Philips Corp
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Filing: 1963-04-01
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Granted: 1966-11-08
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Grimmeiss Hermann George
- 👤 Kischio Werner
- 👤 Memming Rudiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:46
CPC Classifications
H; H10; H10P; H10P95/00; C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/40; H10F; H10F99/00; H10P14/00; H10P14/40; H10P14/46; Y; Y10; Y10S; Y10S148/00; Y10S148/064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A METHOD OF MAKING A BARRIER LAYER SEMICONDUCTOR DEVICE COMPRISING COATING A SURFACE OF A CADMIUM SULPHIDE BODY WITH A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, GOLD, SILVER, AND NICKEL, DIFFUSING A PORTION OF THE COATING INTO THE CADMIUM SULPHIDE BODY, AND THEREAFTER ETCHING AT LEAST PART OF THE REMAINING METAL COATING WITH A SELECTIVE ALKALINE ETCHING AGENT TO REMOVE THE COATED METAL BUT WITHOUT ATTACKING THE UNDERLYING CADMIUM SULPHIDE BODY, SAID ETCHING AGENT COMPRISING A SOLUTION CONSISTING ESSENTIALLY OF ABOUT 5%-30% BY WEIGHT OF POTASSIUM CYANIDE AND ABOUT 0.1%-5% BY WEIGHT OF HYDROGEN PEROXIDE, BALANCE WATER.
Claim 2
Independent Claim
99 words
A METHOD OF MAKING A BARRIER LAYER SEMICONDUCTOR DEVICE COMPRISING COATING A SURFACE OF A CADMIUM SULPHIDE BODY WITH A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER, GOLD, SILVER, AND NICKEL, DIFFUSING A PORTION OF THE COATING INTO THE CADMIUM SULPHIDE BODY, AND THEREAFTER ETCHING AT LEAST PART OF THE REMAINING METAL COATING WITH A SELECTIVE ALKALINE ETCHING AGENT TO REMOVE THE COATED METAL BUT WITHOUT ATTACKING THE UNDERLYING CADMIUM SULPHIDE BODY, SAID ETCHING AGENT COMPRISING A SOLUTION CONSISTING ESSENTIALLY OF ABOUT 5%-30% BY WEIGHT OF POTASSIUM CYANIDE AND ABOUT 0.1%-5% BY WEIGHT OF HYDROGEN PEROXIDE, BALANCE WATER.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |