US4105477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doping of (hg,cd)te with a group va element
Assignee: Honeywell Inc
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Filing: 1977-10-31
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Granted: 1978-08-08
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Expires: 1997-10-31
Abstract
Abstract Mercury cadmium telluride having a quantity of an acceptor material selected from Group VA of the Periodic Table, consisting of nitrogen, phosphorus, arsenic and antimony and bismuth dispersed therein, preferably in an amount sufficient to measurably increase the acceptor concentration of the semiconductor. Most preferred are phosphorus, arsenic and antimony. Also disclosed are junctions formed by two adjacent regions of mercury cadmium telluride in which one of the regions contains an acceptor concentration increasing amount of nitrogen phosphorus, arsenic, bismuth or antimony. A method is disclosed which permits diffusion of these additives into a body of already formed mercury cadmium telluride.
Inventors
- 👤 Eric S. Johnson
- 👤 Joseph L. Schmit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:26
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/80; H10D62/86; H10D62/862; C; C30; C30B; C30B29/00; C30B29/10; C30B29/46; C30B29/48; C30B31/00; H10P; H10P32/00; H10P32/10; H10P32/12; H10P32/17; Y; Y10; Y10S; Y10S438/00; Y10S438/971
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
65 words
A method of adjusting the acceptor concentration in a body of mercury cadmium telluride, comprising the steps of: contacting a body of mercury cadmium telluride with a quantity of acceptor material selected from the group consisting of phosphorus, arsenic and antimony; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said acceptor material within said body.
Claim 2
Independent Claim
65 words
A method of adjusting the acceptor concentration in a body of mercury cadmium telluride, comprising the steps of: contacting a body of mercury cadmium telluride with a quantity of acceptor material selected from the group consisting of phosphorus, arsenic and antimony; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said acceptor material within said body.
Claim 3
Dependent Claim
26 words
The composition of claim 1 wherein said quantity of acceptor material ranges from 10 10 atoms per cubic centimeter to 10 20 atoms per cubic centimeter.
Claim 4
Dependent Claim
20 words
The composition of claim 1 wherein said acceptor material is present at the lattice sites in said mercury cadmium telluride.
Claim 5
Dependent Claim
18 words
The composition of claim 1 wherein said acceptor material is substituted for tellurium in said mercury cadmium telluride.
Claim 6
Dependent Claim
11 words
The composition of claim 1 wherein said acceptor material is phosphorus.
Claim 7
Dependent Claim
11 words
The composition of claim 1 wherein said acceptor material is arsenic.
Claim 8
Dependent Claim
11 words
The composition of claim 1 wherein said acceptor material is antimony.
Claim 9
Dependent Claim
19 words
The method of claim 1 wherein said temperature ranges from 625° to 675° C for at least 24 hours.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein said time ranges from 150 to 180 hours.
Claim 11
Dependent Claim
28 words
The method of claim 1 which further includes the step of providing a mercury vapor pressure during said heating from a source other than said mercury cadmium telluride.
Claim 12
Independent Claim
78 words
A method of increasing the acceptor concentration of a first region of mercury cadmium telluride with respect to a second adjacent region of mercury cadmium telluride comprising the steps of: contacting said first region of mercury cadmium telluride with a quantity of acceptor material selected from the group consisting of phosphorous, arsenic and antimony; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said acceptor material within said body.
Claim 13
Independent Claim
78 words
A method of increasing the acceptor concentration of a first region of mercury cadmium telluride with respect to a second adjacent region of mercury cadmium telluride comprising the steps of: contacting said first region of mercury cadmium telluride with a quantity of acceptor material selected from the group consisting of phosphorous, arsenic and antimony; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said acceptor material within said body.
Claim 14
Dependent Claim
26 words
The composition of claim 11 wherein said quantity of acceptor material ranges from 10 10 atoms per cubic centimeter to 10 20 atoms per cubic centimeter.
Claim 15
Dependent Claim
20 words
The composition of claim 11 wherein said acceptor material is present at the lattice sites in said mercury cadmium telluride.
Claim 16
Dependent Claim
18 words
The composition of claim 11 wherein said acceptor material is substituted for tellurium in said mercury cadmium telluride.
Claim 17
Dependent Claim
11 words
The composition of claim 11 wherein said acceptor material is phosphorus.
Claim 18
Dependent Claim
11 words
The composition of claim 11 wherein said acceptor material is arsenic.
Claim 19
Dependent Claim
11 words
The composition of claim 11 wherein said acceptor material is antimony.
Claim 20
Dependent Claim
19 words
The method of claim 11 wherein said temperature ranges from 625° to 675° C for at least 24 hours.
Claim 21
Dependent Claim
14 words
The method of claim 11 wherein said time ranges from 150 to 180 hours.
Claim 22
Dependent Claim
28 words
The method of claim 11 which further includes the step of providing a mercury vapor pressure during said heating from a source other than said mercury cadmium telluride.
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) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |