Patent US2966432A successfully refreshed from Google Patents.
US2966432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of silicon
Assignee: AT&T Inc
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Filing: 1958-01-15
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Granted: 1960-12-27
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Expires: 1978-01-15
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:31
CPC Classifications
H; H10; H10P; H10P95/00; H10W; H10W74/00; H10W74/10; H10W74/131; Y; Y10; Y10S; Y10S438/00; Y10S438/904; Y10S438/974
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS FOR REDUCING THE SURFACE RECOMBINATION VELOCITY OF MINORITY CHARGE CARRIERS WITH MAJORITY CHARGE CARRIERS OF A SILICON DEVICE WHICH INCLUDES A P-N RECTIFYING JUNCTION COMPRISING THE STEPS OF EXPOSING THE SILICON BODY INCLUDED IN SUCH DEVICE TO AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID FOR A TIME SUFFICIENT TO REMOVE ANY SURFACE OXIDE FILM THEREOVER AND ENCAPSULATING THE SILICON BODY IN A NONOXIDIZING ENVIRONMENT BEFORE SIGNIFICANT REGROWTH OF A SURFACE OXIDE FILM AND WHILE THE SILICON BODY STILL INCLUDES AN ADSORBED LAYER OF HYDROFLUORIC ACID MOLECULES,
Claim 2
Dependent Claim
87 words
THE PROCESS FOR REDUCING THE SURFACE RECOMBINATION VELOCITY OF MINORITY CHARGE CARRIERS WITH MAJORITY CHARGE CARRIERS OF A SILICON DEVICE WHICH INCLUDES A P-N RECTIFYING JUNCTION COMPRISING THE STEPS OF EXPOSING THE SILICON BODY INCLUDED IN SUCH DEVICE TO AN AQUEOUS SOLUTION OF HYDROFLUORIC ACID FOR A TIME SUFFICIENT TO REMOVE ANY SURFACE OXIDE FILM THEREOVER AND ENCAPSULATING THE SILICON BODY IN A NONOXIDIZING ENVIRONMENT BEFORE SIGNIFICANT REGROWTH OF A SURFACE OXIDE FILM AND WHILE THE SILICON BODY STILL INCLUDES AN ADSORBED LAYER OF HYDROFLUORIC ACID MOLECULES,
References Cited (Backward Citations)
US2419237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |