US3486953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective removal of dendrites from dendritic webbed semiconductor material
Assignee: Westinghouse Electric Corp
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Filing: 1966-05-26
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Granted: 1969-12-30
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Expires: 1986-05-26
Abstract
No abstract record available.
Inventors
- 👤 W Ing David
- 👤 Thomas J Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:16
CPC Classifications
H; H10; H10P; H10P95/00; C; C23; C23F; C23F1/00; Y; Y10; Y10S; Y10S148/00; Y10S148/051; Y10S148/053; Y10S148/054; Y10S148/115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS FOR SELECTIVELY REMOVING DENDRITES FROM A BODY OF SILICON WEBBED DENDRITIC SEMICONDUCTOR MATERIAL, THE BODY COMPRISING AT LEAST TWO SUBSTANTIALLY PARALLEL DENDRITIC CRYSTALS JOINED CRYSTALLOGRAPHICALLY INTO A UNITARY BODY BY A WEB PORTION EXTENDING BETWEEN THE DENDRITIC CRYSTALS OVER THE LENGTH OF THE BODY, THE PROCESS COMPRISING DISPOSING THE BODY IN AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE HEATED TO A TEMPERATURE OF AT LEAST 80*C. WHEREBY THE DENDRITIC CRYSTALS ARE SELECTIVELY CHEMICALLY ETCHED FROM THE WEB PORTION OF THE BODY LEAVING THE WEB PORTION SUBSTANTIALLY UNAFFECTED BY THE SOLUTION.
Claim 2
Dependent Claim
102 words
A PROCESS FOR SELECTIVELY REMOVING DENDRITES FROM A BODY OF SILICON WEBBED DENDRITIC SEMICONDUCTOR MATERIAL, THE BODY COMPRISING AT LEAST TWO SUBSTANTIALLY PARALLEL DENDRITIC CRYSTALS JOINED CRYSTALLOGRAPHICALLY INTO A UNITARY BODY BY A WEB PORTION EXTENDING BETWEEN THE DENDRITIC CRYSTALS OVER THE LENGTH OF THE BODY, THE PROCESS COMPRISING DISPOSING THE BODY IN AN AQUEOUS SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE HEATED TO A TEMPERATURE OF AT LEAST 80*C. WHEREBY THE DENDRITIC CRYSTALS ARE SELECTIVELY CHEMICALLY ETCHED FROM THE WEB PORTION OF THE BODY LEAVING THE WEB PORTION SUBSTANTIALLY UNAFFECTED BY THE SOLUTION.
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) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |