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US4814237A
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Thin-film electroluminescent element
Assignee: Sharp Corp
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Filing: 1987-07-24
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Granted: 1989-03-21
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Expires: 2007-07-24
Abstract
Abstract A thin film EL element has a glass substrate, a pair of electrode layers formed on this glass substrate, and an electroluminescent layer sandwiched between these electrode layers. The glass substrate is of non-alkali type and has volume resistivity of 10 6 ohm-cm or greater at 600° C., alkali content of 0.5 wt % or less, and strain point of 600° C. or higher.
Inventors
- 👤 Noriaki Nakamura
- 👤 Kinichi Isaka
- 👤 Masashi Kawaguchi
- 👤 Hiroshi Kishishita
- 👤 Hisashi Uede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:43
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
A thin film EL element comprising a glass substrate of other than molten silica, a pair of electrode layers formed on said glass substrate, and an electroluminescent layer sandwiched between said electrode layers, said glass substrate being non-alkali type glass having volume resistivity of 10 6 ohm-cm or greater at 600° C., alkali content of 0.5 wt% or less and strain point of 600° C. or higher.
Claim 2
Dependent Claim
67 words
A thin film EL element comprising a glass substrate of other than molten silica, a pair of electrode layers formed on said glass substrate, and an electroluminescent layer sandwiched between said electrode layers, said glass substrate being non-alkali type glass having volume resistivity of 10 6 ohm-cm or greater at 600° C., alkali content of 0.5 wt% or less and strain point of 600° C. or higher.
Claim 3
Dependent Claim
24 words
The thin film EL element of claim 1 wherein said glass substrate is non-alkali type glass having alkali content of 0.2 wt% or less.
References Cited (Backward Citations)
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US4602189A
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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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |