Patent US4158849A successfully refreshed from Google Patents.
US4158849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heterojunction semiconductor device
Assignee: RCA Corp
•
Filing: 1978-03-27
•
Granted: 1979-06-19
•
Expires: 1998-03-27
Abstract
Abstract A layer of germanium on a body of P type conductivity single crystal indium phosphide provides a blocking heterojunction. This device will emit light when a suitable voltage is placed thereacross or the device can be used as a photoconductor to generate electrons when light is directed thereon.
Inventors
- 👤 Frank Z. Harwylo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:00
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/40; H04B10/43; H10; H10D; H10D62/00; H10D62/80; H10D62/82; H10F; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/222; H10F55/00; H10F55/18; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/811
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
A heterojunction semiconductor device comprising a body of indium phosphide and a layer of germanium on a surface of the indium phosphide body and forming a blocking junction therebetween.
Claim 2
Dependent Claim
29 words
A heterojunction semiconductor device comprising a body of indium phosphide and a layer of germanium on a surface of the indium phosphide body and forming a blocking junction therebetween.
Claim 3
Dependent Claim
20 words
A heterojunction semiconductor device in accordance with claim 1 in which the indium phosphide body is of a P-type conductivity.
Claim 4
Dependent Claim
48 words
A heterojunction semiconductor device in accordance with claim 2 in which the indium phosphide body has opposed surfaces, the germanium layer is on one of the opposed surfaces, a conductive contact is on the other of said opposed surfaces and a conductive contact is on the germanium layer.
Claim 5
Dependent Claim
41 words
A heterojunction semiconductor device in accordance with claim 3 in which each of said conductive contacts includes a layer of nickel on the germanium layer and on the indium phosphide body respectively, and a layer of gold on the nickel layer.
References Cited (Backward Citations)
US3369132A
Cited
US3603847A
Cited
US3982261A
Cited
US3982261B1
Cited
US4081290A
Cited
US4074305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |