US5646480A
Expired / Lapsed
US
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Metal assist structure for an electroluminescent display
Assignee: Northrop Grumman Corp
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Filing: 1995-06-19
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Granted: 1997-07-08
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Expires: 2015-06-19
Abstract
Abstract An improved electroluminescent display panel has a plurality of parallel metal assist structures deposited on a glass substrate, a plurality of parallel transparent electrodes are deposited over and aligned with the metal assist structures such that each metal assist structure is surrounded by a transparent electrode. A conventional stack of dielectric and phosphor layers and a plurality of metal electrodes is deposited thereon to complete the electroluminescent display panel.
Inventors
- 👤 Roger Carroll
- 👤 Timothy Eschrich
- 👤 William Tanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:19
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; H10; H10K; H10K50/00; H10K50/80; H10K50/805; H10K50/81; H10K50/814; H10K59/00; H10K59/80; H10K59/805; H10K59/8051; H10K59/80516
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
An electroluminescent display panel comprising: a. a glass substrate; b. a plurality of parallel metal assist structures deposited on the glass substrate; c. a plurality of parallel transparent electrodes deposited over and aligned with the plurality of parallel metal assist structures such that each parallel metal assist structure is surrounded by a transparent electrode and each transparent electrode has a surface over which a first dielectric layer can be deposited, which surface has no sharp corners; d. a first dielectric layer deposited on the surface of each of the plurality of parallel transparent electrodes; e. a layer of phosphor material deposited on the first dielectric layer; f. a second dielectric layer deposited on the layer of phosphor material; and g. a plurality of metal electrodes deposited over the second dielectric layer.
Claim 2
Dependent Claim
131 words
An electroluminescent display panel comprising: a. a glass substrate; b. a plurality of parallel metal assist structures deposited on the glass substrate; c. a plurality of parallel transparent electrodes deposited over and aligned with the plurality of parallel metal assist structures such that each parallel metal assist structure is surrounded by a transparent electrode and each transparent electrode has a surface over which a first dielectric layer can be deposited, which surface has no sharp corners; d. a first dielectric layer deposited on the surface of each of the plurality of parallel transparent electrodes; e. a layer of phosphor material deposited on the first dielectric layer; f. a second dielectric layer deposited on the layer of phosphor material; and g. a plurality of metal electrodes deposited over the second dielectric layer.
Claim 3
Dependent Claim
19 words
The elctroluminescent display panel of claim 1 wherein the parallel metal assist structures are one of tungsten and osmium.
Claim 4
Dependent Claim
16 words
The electroluminescent display of claim 1 wherein the parallel metal assist structures are a quad metal.
Claim 5
Dependent Claim
44 words
The electroluminescent display of claim 1 wherein a portion of each parallel transparent electrode covers a top surface of an associated metal conductor and that portion of the parallel transparent electrode has a height greater than a height of the associated metal assist structure.
Claim 6
Dependent Claim
31 words
The electroluminescent display of claim wherein a combined height of the portion of the parallel transparent electrode and the height of the associated metal assist structure does not exceed 6000 angstroms.
Claim 7
Independent Claim
135 words
A method of making an electroluminescent display comprising the steps of: a. providing a glass substrate; b. depositing a plurality of parallel metal assist structures on the glass substrate; c. depositing a plurality of transparent electrodes over and aligned with the plurality of parallel metal assist structures so that each metal assist structure is surrounded by a transparent electrode and each transparent electrode has a surface over which a first dielectric layer can be deposited, which surface has no sharp corners; d. depositing a first dielectric layer on the surface of each of the plurality of transparent electrodes; e. depositing a layer of phosphor material on the first dielectric layer; f. depositing a second dielectric layer on the layer of phosphor material; and g. placing a plurality of metal electrodes over the second dielectric layer.
Claim 8
Independent Claim
135 words
A method of making an electroluminescent display comprising the steps of: a. providing a glass substrate; b. depositing a plurality of parallel metal assist structures on the glass substrate; c. depositing a plurality of transparent electrodes over and aligned with the plurality of parallel metal assist structures so that each metal assist structure is surrounded by a transparent electrode and each transparent electrode has a surface over which a first dielectric layer can be deposited, which surface has no sharp corners; d. depositing a first dielectric layer on the surface of each of the plurality of transparent electrodes; e. depositing a layer of phosphor material on the first dielectric layer; f. depositing a second dielectric layer on the layer of phosphor material; and g. placing a plurality of metal electrodes over the second dielectric layer.
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) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |