Patent US3169304A successfully refreshed from Google Patents.
US3169304A
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Method of forming an ohmic semiconductor contact
Assignee: Giannini Controls Corp
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Filing: 1961-06-22
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Granted: 1965-02-16
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Expires: 1981-06-22
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:02
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/40; H10P14/46; H10P32/00; H10P32/10; H10P32/14; H10P32/1408; H10P32/17; H10P32/171; H10W; H10W72/00; H10W72/50; H10W72/531; H10W72/5363
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE METHOD OF FORMING A SUBSTANTIALLY OHMIC CONTACT ON A SURFACE OF P-TYPE SILICON, SAID METHOD COMPRISING CONTACTING THE SURFACE WITH AN QUEOUS SOLUTION CONTAINING A REDUCIBLE NICKEL SALT, AN ALKALI METAL HYPOPHOSPHITE AND A SOURCE OF BORON ATOMS TO DEPOSIT SIMULTANEOUSLY ON SAAID SURFACE A LAYER OF METALLIC NICKEL AND RELATIVELY MINOR PORPORTIONS OF PHOSPHORUS ATOMS AND BORON ATOMS, THE CONCENTRATION OF THE BORON SOURCE IN THE SOLUTION BEING SUFFICIENT THAT THE DEPOSITED BORON ATOMS COMPENSATE ELECTRICALLY THE DEPOSITED PHOSPHORUS ATOMS.
Claim 2
Independent Claim
82 words
THE METHOD OF FORMING A SUBSTANTIALLY OHMIC CONTACT ON A SURFACE OF P-TYPE SILICON, SAID METHOD COMPRISING CONTACTING THE SURFACE WITH AN QUEOUS SOLUTION CONTAINING A REDUCIBLE NICKEL SALT, AN ALKALI METAL HYPOPHOSPHITE AND A SOURCE OF BORON ATOMS TO DEPOSIT SIMULTANEOUSLY ON SAAID SURFACE A LAYER OF METALLIC NICKEL AND RELATIVELY MINOR PORPORTIONS OF PHOSPHORUS ATOMS AND BORON ATOMS, THE CONCENTRATION OF THE BORON SOURCE IN THE SOLUTION BEING SUFFICIENT THAT THE DEPOSITED BORON ATOMS COMPENSATE ELECTRICALLY THE DEPOSITED PHOSPHORUS ATOMS.
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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |