US4451968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for providing an ohmic contact of high resistance on a semiconductor at low temperatures
Assignee: Spheral Solar Power Inc
•
Filing: 1981-09-08
•
Granted: 1984-06-05
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Expires: 2001-09-08
Abstract
Abstract A method and device are disclosed which allows an ohmic electrical contact with P-type semiconductor material using metallic foil at low temperature without significant diffusion of the metal into the semiconductor. The contact exhibits opposition to physical separation and has a predetermined electrical resistance.
Inventors
- 👤 Millard Jensen
- 👤 Jules D. Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:09
CPC Classifications
H; H10; H10W; H10W99/00; H10F; H10F71/00; H10F71/121; H10F77/00; H10F77/20; H10F77/206; H10F77/211; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/547; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
60 words
A method for making ohmic contact to a solar array, comprising the steps of: providing a solar array including a plurality of substantially spherical semiconductor particles; pressing respective ones of said particles against a metal foil while applying pressure and low heat between said particle and said foil; whereby an ohmic contact is formed between said particle and said foil.
Claim 2
Independent Claim
60 words
A method for making ohmic contact to a solar array, comprising the steps of: providing a solar array including a plurality of substantially spherical semiconductor particles; pressing respective ones of said particles against a metal foil while applying pressure and low heat between said particle and said foil; whereby an ohmic contact is formed between said particle and said foil.
Claim 3
Dependent Claim
29 words
The method of claim 1, wherein said pressure is applied to achieve a predetermined degree of deformation of said foil, whereby said ohmic contact has approximately a predetermined resistance.
Claim 4
Independent Claim
69 words
A method for making ohmic contact between aluminum and silicon, comprising the steps of: providing a silicon particle having an exposed convex silicon surface; providing an aluminum foil; pressing said silicon particle into said aluminum foil at a low temperature to deform said aluminum foil; whereby said deformation step removes aluminum oxides from the surface of said aluminum foil to permit good contact between said silicon and said aluminum.
Claim 5
Independent Claim
69 words
A method for making ohmic contact between aluminum and silicon, comprising the steps of: providing a silicon particle having an exposed convex silicon surface; providing an aluminum foil; pressing said silicon particle into said aluminum foil at a low temperature to deform said aluminum foil; whereby said deformation step removes aluminum oxides from the surface of said aluminum foil to permit good contact between said silicon and said aluminum.
Claim 6
Dependent Claim
13 words
The method of claim 1, wherein said temperature is less than 300 C.
Claim 7
Dependent Claim
13 words
The method of claim 2, wherein said temperature is less than 300 C.
Claim 8
Dependent Claim
13 words
The method of claim 3, wherein said temperature is less than 300 C.
Claim 9
Dependent Claim
27 words
The method of claim 1, wherein pressure in the range of 0.5 to 10 pounds per particle is applied between said respective particle and said metal foil.
Claim 10
Dependent Claim
27 words
The method of claim 2, wherein pressure in the range of 0.5 to 10 pounds per particle is applied between said respective particle and said metal foil.
Claim 11
Dependent Claim
27 words
The method of claim 3, wherein pressure in the range of 0.5 to 10 pounds per particle is applied between said respective particle and said metal foil.
Claim 12
Dependent Claim
27 words
The method of claim 4, wherein pressure in the range of 0.5 to 10 pounds per particle is applied between said respective particle and said metal foil.
Claim 13
Dependent Claim
27 words
The method of claim 5, wherein pressure in the range of 0.5 to 10 pounds per particle is applied between said respective particle and said metal foil.
Claim 14
Dependent Claim
27 words
The method of claim 6, wherein pressure in the range of 0.5 to 10 pounds per particle is applied between said respective particle and said metal foil.
Claim 15
Dependent Claim
29 words
The method of claim 1, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
Claim 16
Dependent Claim
29 words
The method of claim 12, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
Claim 17
Dependent Claim
29 words
The method of claim 3, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
Claim 18
Dependent Claim
29 words
The method of claim 4, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
Claim 19
Dependent Claim
29 words
The method of claim 10, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
Claim 20
Dependent Claim
29 words
The method of claim 6, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
Claim 21
Dependent Claim
29 words
The method of claim 7, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
Claim 22
Dependent Claim
29 words
The method of claim 9, wherein said respective particle is pressed over a predetermined distance, to deform said metal foil to provide a contact having approximately a predetermined resistance.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |