Patent US2978367A successfully refreshed from Google Patents.
US2978367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Introduction of barrier in germanium crystals
Assignee: RCA Corp
•
Filing: 1958-05-26
•
Granted: 1961-04-04
•
Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Aaron L Kestenbaum
- 👤 Samuel W Daskam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:00
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/18; H10P32/17; H10P32/171; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF FABRICATING A LEACHED PN JUNCTION IN AN N-CONDUCTIVITY TYPE GERMANIUM WAFER COMPRISING DIFFUSING SUFFICIENT NICKEL INTO ONE SURFACE OF SAID WAFER TO CONVERT AT LEAST A PORTION THEREOF TO P-TYPE, AND SIMULTANEOUSLY ALLOYING TO THE OPPOSITE SURFACE OF SAID WAFER A PELLET OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF LEAD, TIN, AND LEAD-TIN ALLOYS, SAID PELLET LEACHING SUFFICIENT NICKEL OUT OF THE WAFER REGION ADJACENT SAID PELLET TO LEAVE SAID REGION N-CONDUCTIVITY TYPE.
Claim 2
Independent Claim
77 words
THE METHOD OF FABRICATING A LEACHED PN JUNCTION IN AN N-CONDUCTIVITY TYPE GERMANIUM WAFER COMPRISING DIFFUSING SUFFICIENT NICKEL INTO ONE SURFACE OF SAID WAFER TO CONVERT AT LEAST A PORTION THEREOF TO P-TYPE, AND SIMULTANEOUSLY ALLOYING TO THE OPPOSITE SURFACE OF SAID WAFER A PELLET OF MATERIAL SELECTED FROM THE GROUP CONSISTING OF LEAD, TIN, AND LEAD-TIN ALLOYS, SAID PELLET LEACHING SUFFICIENT NICKEL OUT OF THE WAFER REGION ADJACENT SAID PELLET TO LEAVE SAID REGION N-CONDUCTIVITY TYPE.
References Cited (Backward Citations)
US2725315A
Cited
US2774695A
Cited
US2846346A
Cited
US2813233A
Cited
US2845374A
Cited
US2827436A
Cited
US2836523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |