US3858306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy junctions in mercury cadmium telluride
Assignee: Honeywell Inc
•
Filing: 1971-08-05
•
Granted: 1975-01-07
•
Expires: 1991-08-05
Abstract
Abstract PN junctions are formed in a P type body of mercury cadmium telluride by heating an indium body to form hot indium, which is then deposited on a surface of the P type body. The hot indium is believed to cause localized heating of the P type body which is sufficient for the formation of an alloy junction, but insufficient for the complete displacement of mercury within the alloy junction.
Inventors
- 👤 Arvid E Kloek
- 👤 Myrsyl Walter Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:15
CPC Classifications
H; H10; H10P; H10P32/00; H10P32/10; H10P32/16; H10F; H10F99/00; H10P32/17
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A METHOD OF FORMING AN INFARED SENSITIVE PHOTODIODE COMPRISING: HEATING AN INDIUM BODY TO FORM LIQUID INDIUM MAINTAINING A P TYPE BODY OF MERCURY CADMIUM TELLURIDE AT A TEMPERATURE SUBSTANTIALLY LESS THAN 170*C, AND DEPOSITING THE LIQUID INDIUM ON A SURFACE OF THE P TYPE BODY OF MERCURY CADMIUM TELLURIDE TO FORM AN INDIUM LAYER AND A RECTIFYING, PHOTODETECTING JUNCTION PROXIMATE THE INTERFACE OF THE P TYPE BODY AND THE INDIUM LAYER.
Claim 2
Independent Claim
72 words
A METHOD OF FORMING AN INFARED SENSITIVE PHOTODIODE COMPRISING: HEATING AN INDIUM BODY TO FORM LIQUID INDIUM MAINTAINING A P TYPE BODY OF MERCURY CADMIUM TELLURIDE AT A TEMPERATURE SUBSTANTIALLY LESS THAN 170*C, AND DEPOSITING THE LIQUID INDIUM ON A SURFACE OF THE P TYPE BODY OF MERCURY CADMIUM TELLURIDE TO FORM AN INDIUM LAYER AND A RECTIFYING, PHOTODETECTING JUNCTION PROXIMATE THE INTERFACE OF THE P TYPE BODY AND THE INDIUM LAYER.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the P type body is maintained at a temperature of about 27*C.
Claim 4
Dependent Claim
15 words
The method of claim 1 and further comprising: making electrical contact to the indium layer.
Claim 5
Dependent Claim
16 words
The method of claim 1 and further comprising: making electrical contact to the P type body.
Claim 6
Dependent Claim
25 words
The method of claim 4 wherein making the electrical contact to the P type body comprises depositing a gold layer on the P type body.
Claim 7
Dependent Claim
57 words
The method of claim 5 wherein the gold layer is deposited in the region where electrical contact is to be made prior to depositing the indium layer, and wherein the body and the gold layer are heated to form a diffused region within the body adjacent the gold layer, the diffused region having diffused gold impurities therein.
References Cited (Backward Citations)
US3459603A
Cited
US3723190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |