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US5476727A
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Thin film electroluminescence display element
Assignee: Fuji Electric Co Ltd
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Filing: 1993-09-17
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Granted: 1995-12-19
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Expires: 2013-09-17
Abstract
Abstract A thin film electroluminescence display element composed of a soda-lime glass substrate having provided thereon a barrier layer including tantalum (V) oxide, a transparent indium-tin oxide (ITO) electrode as a first electrode, a first insulating layer, a luminescent layer, a second insulating layer, and a second electrode is disclosed. The tantalum (V) oxide barrier layer effectively prevents sodium in the soda-lime glass substrate from diffusing into the ITO transparent electrode.
Inventors
- 👤 Yukihiro Maruta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:04
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; H05B33/26; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A thin film electroluminescence display element comprising: a soda-lime glass substrate; a barrier layer comprising a first layer on the substrate including tantalum (V) oxide and a second layer on the first layer inhibiting migration of oxygen from the tantalum (V) oxide, said second layer comprising at least one of silica and alumina; a transparent indium-tin oxide electrode on the barrier layer; a first insulating layer on the indium-tin oxide electrode; a luminescent layer on the first insulating layer; a second insulating layer on the luminescent layer; and another electrode on the second insulating layer.
Claim 2
Dependent Claim
95 words
A thin film electroluminescence display element comprising: a soda-lime glass substrate; a barrier layer comprising a first layer on the substrate including tantalum (V) oxide and a second layer on the first layer inhibiting migration of oxygen from the tantalum (V) oxide, said second layer comprising at least one of silica and alumina; a transparent indium-tin oxide electrode on the barrier layer; a first insulating layer on the indium-tin oxide electrode; a luminescent layer on the first insulating layer; a second insulating layer on the luminescent layer; and another electrode on the second insulating layer.
Claim 3
Dependent Claim
21 words
A thin film electroluminescence display element as claimed in claim 1, wherein the second layer of said barrier layer comprises silica.
Claim 4
Dependent Claim
21 words
A thin film electroluminescence display element as claimed in claim 1, wherein the second layer of said barrier layer comprises alumina.
Claim 5
Dependent Claim
18 words
A thin film electroluminescence display element as claimed in claim 1, wherein said first insulating layer includes alumina.
Claim 6
Dependent Claim
94 words
A thin film electroluminescence display element comprising: a glass substrate; a barrier layer comprising a first layer on the substrate including tantalum (V) oxide and a second layer on the first layer inhibiting migration of oxygen from the tantalum (V) oxide, said second layer comprising at least one of silica and alumina; a transparent indium-tin oxide electrode on the barrier layer; a first insulating layer on the indium-tin oxide electrode; a luminescent layer on the first insulating layer; a second insulating layer on the luminescent layer; and another electrode on the second insulating layer.
Claim 7
Dependent Claim
94 words
A thin film electroluminescence display element comprising: a glass substrate; a barrier layer comprising a first layer on the substrate including tantalum (V) oxide and a second layer on the first layer inhibiting migration of oxygen from the tantalum (V) oxide, said second layer comprising at least one of silica and alumina; a transparent indium-tin oxide electrode on the barrier layer; a first insulating layer on the indium-tin oxide electrode; a luminescent layer on the first insulating layer; a second insulating layer on the luminescent layer; and another electrode on the second insulating layer.
Claim 8
Dependent Claim
18 words
A thin film electroluminescence display element as claimed in claim 5, wherein said first insulating layer includes alumina.
Claim 9
Dependent Claim
18 words
A thin film electroluminescence display element as claimed in claim 5, wherein the glass substrate includes diffusible sodium.
Claim 10
Dependent Claim
99 words
A thin film electroluminescence display element comprising: a substrate that permits the outdiffusion of sodium; a barrier layer comprising a first layer on the substrate including tantalum (V) oxide and a second layer on the first layer inhibiting migration of oxygen from the tantalum (V) oxide, said second layer comprising at least one of silica and alumina; a transparent indium-tin oxide electrode on the barrier layer; a first insulating layer on the indium-tin oxide electrode; a luminescent layer on the first insulating layer; a second insulating layer on the luminescent layer; and another electrode on the second insulating layer.
Claim 11
Dependent Claim
99 words
A thin film electroluminescence display element comprising: a substrate that permits the outdiffusion of sodium; a barrier layer comprising a first layer on the substrate including tantalum (V) oxide and a second layer on the first layer inhibiting migration of oxygen from the tantalum (V) oxide, said second layer comprising at least one of silica and alumina; a transparent indium-tin oxide electrode on the barrier layer; a first insulating layer on the indium-tin oxide electrode; a luminescent layer on the first insulating layer; a second insulating layer on the luminescent layer; and another electrode on the second insulating layer.
Claim 12
Dependent Claim
18 words
A thin film electroluminescence display element as claimed in claim 8, wherein said first insulating layer includes alumina.
Claim 13
Dependent Claim
19 words
A thin film electroluminescence display element as claimed in claim 8, wherein the dielectric transparent substrate includes diffusible sodium.
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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) | 1998-12-18 | 1999-06-19 | 1999-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-18 | 2003-06-19 | 2003-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-18 | 2007-06-19 | 2007-12-19 | $7700.00 | Window Closed / Lapsed |