Patent US4105479A successfully refreshed from Google Patents.
US4105479A
Expired / Lapsed
US
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Preparation of halogen doped mercury cadmium telluride
Assignee: Honeywell Inc
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Filing: 1978-02-06
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Granted: 1978-08-08
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Expires: 1998-02-06
Abstract
Abstract Mercury cadmium telluride is disclosed having a quantity of a halogen donor material preferably selected from the group consisting of bromine and iodine dispersed therein in an amount sufficient to measurably increase the donor concentration. Also disclosed are PN junctions formed using this donor material. A method of introducing the donor material is additionally disclosed.
Inventors
- 👤 Eric S. Johnson
- 👤 Joseph L. Schmit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:56
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/10; H10F77/12; H10F77/123; H10F77/1233; H10F30/00; H10F30/20; H10F30/21; H10F30/22; H10F30/221; H10F30/2212; H10P; H10P32/00; H10P32/10; H10P32/12; H10P32/17; Y; Y10; Y10S; Y10S420/00; Y10S420/903; Y10S438/00; Y10S438/914; Y10S438/918; Y10S438/971
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
64 words
A method of adjusting the donor concentration in a body of mercury cadmium telluride, comprising the steps of: contacting a body of mercury cadmium telluride with a quantity of donor materials selected from the group consisting of bromine and iodine; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said donor material within said body.
Claim 2
Independent Claim
64 words
A method of adjusting the donor concentration in a body of mercury cadmium telluride, comprising the steps of: contacting a body of mercury cadmium telluride with a quantity of donor materials selected from the group consisting of bromine and iodine; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said donor material within said body.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said quantity of donor material ranges from 10 10 atoms per cubic centimeter to 10 20 atoms per cubic centimeter.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said donor material is present at the lattice sites of said mercury cadmium telluride.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein said donor material is substituted for tellurium in said mercury cadmium telluride.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said donor material is bromine.
Claim 7
Dependent Claim
11 words
The method of claim 1 wherein said donor material is iodine.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein said temperature ranges from 625° to 675° C for at least 24 hours.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein said temperature is maintained for between 24 and 180 hours.
Claim 10
Dependent Claim
26 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 body.-
Claim 11
Dependent Claim
25 words
The method of claim 9 which further includes the step of providing a quantity of mercury cadmium telluride powder at said temperature during said heating.
Claim 12
Independent Claim
77 words
The method of increasing the donor 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 donor material selected from the group consisting of bromine and iodine; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said donor material within said body.
Claim 13
Independent Claim
77 words
The method of increasing the donor 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 donor material selected from the group consisting of bromine and iodine; and heating said body at a temperature of at least 550° C for a sufficient time to distribute said donor material within said body.
Claim 14
Dependent Claim
26 words
The method of claim 11 wherein said quantity of donor material ranges from 10 10 atoms per cubic centimeter to 10 20 atoms per cubic centimeter.
Claim 15
Dependent Claim
20 words
The method of claim 11 wherein said donor material is present at the lattice sites of said mercury cadmium telluride.
Claim 16
Dependent Claim
18 words
The method of claim 11 wherein said donor material is substituted for tellurium in said mercury cadmium telluride.
Claim 17
Dependent Claim
11 words
The method of claim 11 wherein said donor material is bromine.
Claim 18
Dependent Claim
11 words
The method of claim 11 wherein said donor material is iodine.
Claim 19
Dependent Claim
19 words
The method of claim 11 wherein said temperature ranges from 625° to 675° C for at least 20 hours.
Claim 20
Dependent Claim
26 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 body.
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 |