Patent US4003759A successfully refreshed from Google Patents.
US4003759A
Expired / Lapsed
US
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Ion implantation of gold in mercury cadmium telluride
Assignee: Honeywell Inc
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Filing: 1976-03-01
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Granted: 1977-01-18
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Expires: 1996-03-01
Abstract
Abstract PN junctions in mercury cadmium telluride are formed by implantation of gold ions and a subsequent low temperature--short duration heat treatment.
Inventors
- 👤 Toivo Koehler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:14
CPC Classifications
H; H10; H10P; H10P30/00; H10P30/20; H10P30/202; H10D; H10D62/00; H10D62/80; H10D62/86; H10D62/862; H10P30/21; H10P30/22; H10P30/28
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A method of introducing acceptor impurities into a region of a mercury cadmium telluride body, the method comprising: implanting gold ions into the region; and heat treating the mercury cadmium telluride body at a temperature of between about 150° C and about 250° C for a time of between about 2 minutes and about 40 minutes.
Claim 2
Independent Claim
56 words
A method of introducing acceptor impurities into a region of a mercury cadmium telluride body, the method comprising: implanting gold ions into the region; and heat treating the mercury cadmium telluride body at a temperature of between about 150° C and about 250° C for a time of between about 2 minutes and about 40 minutes.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the heat treating is at a temperature of about 200° C for a time of about 5 minutes.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the mercury cadmium telluride body has an n-type conductivity.
Claim 5
Dependent Claim
18 words
The method of claim 3 wherein the implanting and heat treating cause the region to have p-type conductivity.
Claim 6
Dependent Claim
43 words
The method of claim 1 wherein the gold ions have, during the implanting step, an energy of greater than about 100 KeV and a dose of between about 10 12 ions per cm 2 and about 10 13 ions per cm 2 .
Claim 7
Dependent Claim
42 words
The method of claim 1 and further comprising, prior to the implanting step: forming a passivating layer on a first surface of the mercury cadmium telluride body; and masking the passivating layer with a gold ion impervious mask to define the region.
Claim 8
Independent Claim
61 words
A method of forming a PN junction in an n-type body of mercury cadmium telluride, the method comprising: implanting gold ions into a region of the mercury cadmium telluride body; and heat treating the mercury cadmium telluride body at a temperature of between about 150° and about 250° C for a time of between about 2 minutes and about 40 minutes.
Claim 9
Independent Claim
61 words
A method of forming a PN junction in an n-type body of mercury cadmium telluride, the method comprising: implanting gold ions into a region of the mercury cadmium telluride body; and heat treating the mercury cadmium telluride body at a temperature of between about 150° and about 250° C for a time of between about 2 minutes and about 40 minutes.
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) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |