US4511218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-optical display device and method for its production
Assignee: Robert Bosch GmbH
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Filing: 1982-11-12
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Granted: 1985-04-16
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Expires: 2002-11-12
Abstract
Abstract An electro-optical display device including a substrate which carries a layer of electrodes containing one or more semi-conductive metal oxides. Over particular sections of its surface the layer of electrodes is provided with a metal coating. In these sections (25) the layer of electrodes (20) includes a portion (22) of the metals in elementary condition, which portion becomes greater from the area (A) adjacent to the substrate to the area (0) facing away from the substrate. The metals are available in combined condition in the semi-conductive metal oxides.
Inventors
- 👤 Bernd Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:28
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/13439; G02F1/0102; G02F1/1345
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
An electro-optical display device comprising: a substrate; a layer disposed on said substrate, said layer comprising a semi-conductive metal oxide which at the intersection of said substrate and said layer is 100% oxide; a metallic coating disposed on and adhered to said layer; wherein the elemental metal content of said layer adjacent said substrate is less than the elemental metal content thereof adjacent said coating and wherein the last one-fifth to one-tenth thickness of said layer on the side thereof adjacent said coating is of 100% elemental metal content; and, a plurality of electrical leads respectively bonded to selected portions of said metallic coating.
Claim 2
Dependent Claim
104 words
An electro-optical display device comprising: a substrate; a layer disposed on said substrate, said layer comprising a semi-conductive metal oxide which at the intersection of said substrate and said layer is 100% oxide; a metallic coating disposed on and adhered to said layer; wherein the elemental metal content of said layer adjacent said substrate is less than the elemental metal content thereof adjacent said coating and wherein the last one-fifth to one-tenth thickness of said layer on the side thereof adjacent said coating is of 100% elemental metal content; and, a plurality of electrical leads respectively bonded to selected portions of said metallic coating.
Claim 3
Dependent Claim
15 words
The device according to claim 1 wherein said metal oxide is tin and/or indium oxide.
Claim 4
Independent Claim
127 words
A method for producing an electro-optical display device comprising the steps of: providing a layer of semi-conductive metal oxide on a substrate; reducing a portion of the thickness of said layer to form an elementary metal portion extending a given distance from the exposed surface of said layer into said layer; masking selected portions of the exposed surface of said layer; depositing a metal coating on the elementary metal portion in the areas of the exposed surface which are not masked; removing the masking from said selected portions; oxidizing the areas of the exposed surface which are not metal coated until the underlying elementary metal is returned to a semi-conductive metal oxide; and, adhering a plurality of metallic leads to respective metal coated portions of said layer.
Claim 5
Independent Claim
127 words
A method for producing an electro-optical display device comprising the steps of: providing a layer of semi-conductive metal oxide on a substrate; reducing a portion of the thickness of said layer to form an elementary metal portion extending a given distance from the exposed surface of said layer into said layer; masking selected portions of the exposed surface of said layer; depositing a metal coating on the elementary metal portion in the areas of the exposed surface which are not masked; removing the masking from said selected portions; oxidizing the areas of the exposed surface which are not metal coated until the underlying elementary metal is returned to a semi-conductive metal oxide; and, adhering a plurality of metallic leads to respective metal coated portions of said layer.
Claim 6
Dependent Claim
29 words
The metal according to claim 3, wherein said reducing step includes the step of providing nascent hydrogen to reduce indium trioxide and/or tin oxide to elementary indium and/or tin.
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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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |