US3932291A
Expired / Lapsed
US
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Preparation and doping of semiconducting forms of CuAlS2
Assignee: EIDP Inc
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Filing: 1973-01-10
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Granted: 1976-01-13
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Expires: 1993-01-10
Abstract
Abstract New forms of copper aluminum sulfide are semiconductors. Depending on the amount of dopant present, they are either p-type or n-type.
Inventors
- 👤 Paul C. Donohue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/10; C; C01; C01G; C01G3/00; C04; C04B; C04B35/00; C04B35/515; C04B35/547
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
A semiconducting essentially colorless copper aluminum sulfide having chalcopyrite tetragonal structure having a light absorption coefficient less than 1.5 × 10 2 cm.sup. +1 at 4000A consisting of copper, aluminum and sulfur wherein the ratio of aluminum to copper lies between the range 1.001 and 1.01 and the ratio of sulfur to the sum of copper and aluminum lies between 0.975 and 0.995.
Claim 2
Dependent Claim
63 words
A semiconducting essentially colorless copper aluminum sulfide having chalcopyrite tetragonal structure having a light absorption coefficient less than 1.5 × 10 2 cm.sup. +1 at 4000A consisting of copper, aluminum and sulfur wherein the ratio of aluminum to copper lies between the range 1.001 and 1.01 and the ratio of sulfur to the sum of copper and aluminum lies between 0.975 and 0.995.
Claim 3
Dependent Claim
82 words
A process for producing a semiconducting essentially colorless copper aluminum sulfide having chalcopyrite tetragonal structure and a light absorption coefficient less than 1.5 × 10 2 cm..sup. +1 at 4000A which comprises heating in a closed system in the absence of air at a temperature range of 900°-1250°C. for 12 hours or more a mixture of elemental copper, aluminum and sulfur all of 99.999% purity in atomic weight ratios a. Cu=0.98-1.0, Al=1.001-1.30, S=1.95-2.0; b. Cu=0.98-0.99, Al=1.0-1.30, S=1.95-2.0; or c. Cu=1.00, Al=1.00, S=1.95-1.99.
Claim 4
Dependent Claim
82 words
A process for producing a semiconducting essentially colorless copper aluminum sulfide having chalcopyrite tetragonal structure and a light absorption coefficient less than 1.5 × 10 2 cm..sup. +1 at 4000A which comprises heating in a closed system in the absence of air at a temperature range of 900°-1250°C. for 12 hours or more a mixture of elemental copper, aluminum and sulfur all of 99.999% purity in atomic weight ratios a. Cu=0.98-1.0, Al=1.001-1.30, S=1.95-2.0; b. Cu=0.98-0.99, Al=1.0-1.30, S=1.95-2.0; or c. Cu=1.00, Al=1.00, S=1.95-1.99.
Claim 5
Dependent Claim
15 words
A process of claim 2 in which iodine is used as a vapor transport agent.
Claim 6
Dependent Claim
19 words
A process according to claim 2 wherein the atomic weight ratio is 0.98-1.00 copper, 1.001-1.30 aluminum and 1.95-2.0 sulfur.
Claim 7
Dependent Claim
19 words
A process according to claim 2 wherein the atomic weight ratio is 0.98-0.99 copper, 1.0-1.30 aluminum and 1.95-2.0 sulfur.
Claim 8
Dependent Claim
19 words
A process according to claim 2 wherein the atomic weight ratio is 1.0 copper, 1.0 aluminum and 1.95-1.99 sulfur.
References Cited (Backward Citations)
US2814004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |