US4806436A
Expired / Lapsed
US
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Substrate for amorphous silicon solar cells
Assignee: Altemira Co Ltd
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Filing: 1987-04-27
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Granted: 1989-02-21
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Expires: 2007-04-27
Abstract
Abstract A substrate for amorphous silicon solar cells comprises an aluminum or aluminum alloy plate which is formed on at least one surface thereof with an oxalic acid anodized film in an unsealed state and having a thickness of 1 to 20 μm. A plurality of amorphous silicon solar cells provided on the substrate include lower electrodes of chrominum or the like which are formed on the anodized film. The lower electrodes are electrically insulated from one another by the anodized film.
Inventors
- 👤 Kiyoshi Tada
- 👤 Kenji Tsukamoto
- 👤 Tatsuo Otsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:42
CPC Classifications
H; H10; H10F; H10F77/00; H10F77/10; H10F77/16; H10F77/169; H10F77/1692; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12583; Y10T428/1259; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
47 words
A substrate which is suitable for forming thereon amorphous silicon solar cells, the substrate comprising an aluminum or aluminum alloy plate formed on at least one surface thereof with an oxalic acid anodized film in an unsealed state and having a thickness of 1 to 20 μm.
Claim 2
Dependent Claim
47 words
A substrate which is suitable for forming thereon amorphous silicon solar cells, the substrate comprising an aluminum or aluminum alloy plate formed on at least one surface thereof with an oxalic acid anodized film in an unsealed state and having a thickness of 1 to 20 μm.
Claim 3
Dependent Claim
21 words
A substrate as defined in claim 1 wherein the plate is made of aluminum having a purity of at least 99%.
Claim 4
Dependent Claim
21 words
A substrate as defined in claim 1 wherein the plate is made of aluminum having a purity of at least 99.7%.
Claim 5
Dependent Claim
22 words
A substrate as defined in claim 1 wherein the plate contains up to 0.25% of iron and up to 0.20% of silicon.
Claim 6
Dependent Claim
46 words
A substrate as defined in claim 1 wherein the surface of the plate formed with the anodized film has before the formation of the film a roughness of up to 0.5 μm in terms of the maximum height Rmax. of a sampled portion of the surface.
Claim 7
Dependent Claim
46 words
A substrate as defined in claim 1 wherein the surface of the plate formed with the anodized film has before the formation of the film a roughness of up to 0.3 μm in terms of the maximum height Rmax. of a sampled portion of the surface.
Claim 8
Dependent Claim
74 words
A substrate which is suitable for forming thereon amorphous silicon solar cells, the substrate comprising a plate of aluminum having a purity of at least 99.7% and an oxalic acid anodized film formed on at least one surface thereof having a roughness of up to 0.5 μm in terms of the maximum height Rmax. of sampled portion, the anodized film being in an unsealed state and having a thickness of 1 to 10 μm.
Claim 9
Dependent Claim
74 words
A substrate which is suitable for forming thereon amorphous silicon solar cells, the substrate comprising a plate of aluminum having a purity of at least 99.7% and an oxalic acid anodized film formed on at least one surface thereof having a roughness of up to 0.5 μm in terms of the maximum height Rmax. of sampled portion, the anodized film being in an unsealed state and having a thickness of 1 to 10 μm.
Claim 10
Dependent Claim
30 words
A substrate as defined in claim 7 wherein the plate has an aluminum purity of at least 99.9%, and the anodized film has a thickness of 1 to 5 μm.
Claim 11
Dependent Claim
41 words
A substrate as defined in claim 7 or 8 wherein the plate is formed with the oxalic acid anodized film on one surface thereof and clad with a reinforcing plate of aluminum alloy of the AA5000 type on the other surface.
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) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |