US4947081A
Expired / Lapsed
US
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Dual insulation oxynitride blocking thin film electroluminescence display device
Assignee: Osaka Prefectural Government
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Filing: 1989-02-24
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Granted: 1990-08-07
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Expires: 2009-02-24
Abstract
Abstract In a dual insulation thin film type electroluminescence device comprising a first insulation layer, a light emitting layer and a second insulation layer between a transparent electrode layer and a back electrode layer, a tantalum oxynitride layer is provided between the transparent electrode layer and the first insulation layer to prevent increase of the resistance in the transparent electrode and to prevent increase of current leakage in the insulation layer so that a high luminescence can be achieved.
Inventors
- 👤 Tsunemi Ohiwa
- 👤 Keiichiro Uenae
- 👤 Souichi Ogawa
- 👤 Katsumi Takiguchi
- 👤 Masaaki Yoshitake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:50
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12819
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
A dual insulation thin film electroluminescence device comprising a transparent electrode layer, a first insulation layer, a light emitting layer superimposed on said first insulation layer, a second insulation layer superimposed on said light emitting layer, and a back electrode layer, said electroluminescence device further comprising a tantalum oxynitride layer between said transparent electrode layer and said first insulation layer.
Claim 2
Dependent Claim
60 words
A dual insulation thin film electroluminescence device comprising a transparent electrode layer, a first insulation layer, a light emitting layer superimposed on said first insulation layer, a second insulation layer superimposed on said light emitting layer, and a back electrode layer, said electroluminescence device further comprising a tantalum oxynitride layer between said transparent electrode layer and said first insulation layer.
Claim 3
Dependent Claim
39 words
The thin film electroluminescence device according to claim 1, wherein said tantalum oxynitride layer is represented by the expression Ta 2 O x N y wherein x ranges from 2.4 to 4.9 and y ranges from 0.007 to 1.6.
Claim 4
Dependent Claim
28 words
The thin film electroluminescence device according to claim 1, said device further comprising a second tantalum oxynitride layer between said second insulation layer and said back electrode layer.
Claim 5
Dependent Claim
42 words
The thin film eletroluminescence device according to claim 3, wherein said second tantalum oxynitride layer is represented by the equation Ta 2 O x N y , such that x ranges from 2.4 to 4.9 and y ranges from 0.007 to 1.6.
References Cited (Backward Citations)
US4672266A
Cited
US4721631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |