US4777099A
Expired / Lapsed
US
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Thin-film EL device
Assignee: Olympus Corp
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Filing: 1987-09-30
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Granted: 1988-10-11
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Expires: 2007-09-30
Abstract
Abstract A thin-film electroluminescence device comprises a plate-like transparent electrode formed on a transparent substrate. A first insulating layer is formed on the transparent electrode. A second insulating layer is mounted on an electroluminescent layer made of ZnS:Mn and formed on the first insulating layer. A plate-like back electrode is provided on the second insulating layer. The first and second insulating layers are each made of gadolinium oxide of a purity level of over 99.9% and have a thickness of 0.05 to 0.8 μm.
Inventors
- 👤 Yoshiyuji Mimura
- 👤 Yasuo Isono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:24
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; H05B33/26; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
51 words
A thin-film electroluminescence device comprising: an electroluminescence layer; first and second electrodes formed on both sides of the electroluminescence layer to apply voltage to the electroluminescene layer; and an insulating layer formed of gadolinium oxide and located between at least one of the first and second electrodes and the electroluminescence layer.
Claim 2
Dependent Claim
51 words
A thin-film electroluminescence device comprising: an electroluminescence layer; first and second electrodes formed on both sides of the electroluminescence layer to apply voltage to the electroluminescene layer; and an insulating layer formed of gadolinium oxide and located between at least one of the first and second electrodes and the electroluminescence layer.
Claim 3
Dependent Claim
19 words
The thin-film electroluminescence device according to claim 1, wherein said gadolinium oxide has a purity level of over 99.9%.
Claim 4
Dependent Claim
20 words
The thin-film electroluminescence device according to claim 1, wherein said insulating layer has a thickness of 0.05 to 0.8 μm.
Claim 5
Dependent Claim
20 words
The thin-film electroluminescence device according to claim 3, wherein said insulating layer has a thickness of 0.2 to 0.8 μm.
Claim 6
Dependent Claim
16 words
The thin-film electroluminescence device according to claim 1, wherein said first electrode has a transparent electrode.
Claim 7
Dependent Claim
45 words
The thin-film electroluminescence device according to claim 1, wherein said first and second electrodes are each formed of a stripe electrode group such that the stripe electrode group of said first electrode extends in a direction perpendicular to that of said second stripe electrode group.
Claim 8
Dependent Claim
33 words
The thin-film electroluminescence device according to claim 1, further comprising a second insulating layer made of different material from that of the insulating layer and formed between said insulating layer and the electrode.
Claim 9
Dependent Claim
21 words
The thin-film electroluminescence device according to claim 7, wherein said second insulating layer has a thickness of 0.05 to 0.3 μm.
Claim 10
Dependent Claim
21 words
The thin-film electroluminescence device according to claim 1 wherein said gadolinium oxide insulating layer is in contact with said electroluminescence layer.
Claim 11
Dependent Claim
27 words
The thin-film electroluminescence device according to claim 9, wherein said gadolinium oxide has a purity level of over 99.99% and a thickness of 0.05 to 0.8 micron.
Claim 12
Dependent Claim
20 words
The thin-film electroluminescence device according to claim 10, wherein said insulating layer has a thickness of 0.2 to 0.8 micron.
Claim 13
Dependent Claim
16 words
The thin-film electroluminescence device according to claim 10, wherein said first electrode has a transparent electrode.
Claim 14
Dependent Claim
45 words
The thin-film electroluminescence device according to claim 12, wherein said first and second electrodes are each formed of a stripe electrode group such that the stripe electrode group of said first electrode extends in a direction perpendicular to that of said second stripe electrode group.
Claim 15
Dependent Claim
35 words
The thin-film electroluminescence device according to claim 10, further comprising a second insulating layer made of different material from that of said gadolinium oxide insulating layer and formed between said insulating layer and the electrode.
Claim 16
Dependent Claim
21 words
The thin-film electroluminescence device according to claim 14, wherein said second insulating layer has a thickness of 0.05 to 0.3 micron.
Claim 17
Dependent Claim
35 words
The thin-film electroluminescence device according to claim 9, further comprising a second insulating layer made of different material from that of said gadolinium oxide insulating layer and formed between said insulating layer and the electrode.
Claim 18
Dependent Claim
21 words
The thin-film electroluminescence device according to claim 16, wherein said second insulating layer has a thickness of 0.05 to 0.3 micron.
Claim 19
Dependent Claim
19 words
The thin-film electroluminescence device according to claim 9 wherein said gadolinium oxide has a purity level of over 99.99%.
Claim 20
Dependent Claim
19 words
The thin-film electroluminescence device according to claim 1 wherein said gadolinium oxide has a purity level of over 99.99%.
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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |