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US5955835A
Expired / Lapsed
US
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White-light emitting electroluminescent display device and manufacturing method thereof
Assignee: Korea Institute of Science and Technology
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Filing: 1996-12-12
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Granted: 1999-09-21
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Expires: 2016-12-12
Abstract
Abstract An improved white-light emitting electroluminescent display device and a manufacturing method thereof capable of advantageously generating a light having a red, blue, and green wave lengths within a unique material, which includes a substrate; a lower electrode disposed on the substrate; a first dielectric layer disposed on the lower electrode; a ZnS:Pr,Mn light-emitting layer disposed on the first dielectric layer; a second dielectric layer; and an upper electrode disposed on the second dielectric layer. In addition, a fabrication method thereof includes the steps of forming a first dielectric layer on an upper electrode; forming a light-emitting layer on the first dielectric layer by depositing a ZnS:Pr,Mn luminescent material made of Pr of 1.4˜0.5 mol % and Mn of 0.1˜0.01 mol % on a ZnS host material; forming a second dielectric layer on the light-emitting layer; and forming a lower electrode on the second dielectric layer.
Inventors
- 👤 Myung Hwan Oh
- 👤 Task Sang Hahn
- 👤 Yun Hi Lee
- 👤 Seong Jae Jeung
- 👤 Young Dae Ju
- 👤 Jin Ho Sunwoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:52
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7701; C09K11/7702; H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/22; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
A white-light emitting electroluminescent display device, comprising: a substrate; a first electrode disposed on said substrate; a first dielectric layer disposed on said first electrode; a light-emitting layer disposed on said first dielectric layer; a second dielectric layer disposed on said light-emitting layer; and a second electrode disposed on said second dielectric layer, wherein said light-emitting layer consists essentially of ZnS:Pr,Mn.
Claim 2
Dependent Claim
61 words
A white-light emitting electroluminescent display device, comprising: a substrate; a first electrode disposed on said substrate; a first dielectric layer disposed on said first electrode; a light-emitting layer disposed on said first dielectric layer; a second dielectric layer disposed on said light-emitting layer; and a second electrode disposed on said second dielectric layer, wherein said light-emitting layer consists essentially of ZnS:Pr,Mn.
Claim 3
Dependent Claim
30 words
The device of claim 1, wherein said ZnS:Pr,Mn light-emitting layer is made of Pr in an amount of 1.4˜0.5 mol % and Mn in an amount of 0.1˜0.01 mol %.
Claim 4
Dependent Claim
17 words
The device of claim 1, wherein said Zns:Pr,Mn light-emitting layer has a thickness range of 300˜600 nm.
Claim 5
Dependent Claim
17 words
The device of claim 1, wherein said second dielectric layer has a passivation layer additionally disposed thereon.
Claim 6
Dependent Claim
81 words
A white-light emitting electroluminescent display device, comprising: a substrate; a first electrode disposed on said substrate; first dielectric layers formed on said first electrode by disposing a BaTiO 3 layer and a Si 3 N 4 layer alternately thereon; a light-emitting layer formed on said first dielectric layers; second dielectric layers formed on said light-emitting layer by disposing a Si 3 N 4 layer and a BaTiO 3 layer alternately thereon; and a second electrode formed on said second dielectric layers.
Claim 7
Dependent Claim
81 words
A white-light emitting electroluminescent display device, comprising: a substrate; a first electrode disposed on said substrate; first dielectric layers formed on said first electrode by disposing a BaTiO 3 layer and a Si 3 N 4 layer alternately thereon; a light-emitting layer formed on said first dielectric layers; second dielectric layers formed on said light-emitting layer by disposing a Si 3 N 4 layer and a BaTiO 3 layer alternately thereon; and a second electrode formed on said second dielectric layers.
Claim 8
Dependent Claim
15 words
The device of claim 5, wherein said BaTiO 3 is an amorphous BaTiO 3 .
Claim 9
Dependent Claim
16 words
The device of claim 5, wherein said BaTiO 3 has a thickness range of 200˜350 nm.
Claim 10
Dependent Claim
18 words
The device of claim 5, wherein said Si 3 N 4 has a thickness range of 70˜100 nm.
Claim 11
Dependent Claim
87 words
A white-light emitting electroluminescent display device, comprising: a substrate; a first electrode disposed on said substrate; first dielectric layers formed on said first electrode by disposing a BaTiO 3 layer and a Si 3 N 4 layer alternately thereon; a light-emitting layer comprising ZnS as a host material disposed on said first dielectric layers; second dielectric layers formed on said light-emitting layer by disposing a Si 3 N 4 layer and a BaTiO 3 layer alternately thereon; and a second electrode formed on said second dielectric layers.
Claim 12
Dependent Claim
87 words
A white-light emitting electroluminescent display device, comprising: a substrate; a first electrode disposed on said substrate; first dielectric layers formed on said first electrode by disposing a BaTiO 3 layer and a Si 3 N 4 layer alternately thereon; a light-emitting layer comprising ZnS as a host material disposed on said first dielectric layers; second dielectric layers formed on said light-emitting layer by disposing a Si 3 N 4 layer and a BaTiO 3 layer alternately thereon; and a second electrode formed on said second dielectric layers.
Claim 13
Dependent Claim
15 words
The device of claim 9, wherein said BaTiO 3 is an amorphous BaTiO 3 .
Claim 14
Dependent Claim
13 words
The device of claim 9, wherein said light-emitting layer is ZnS:Pr,Mn light-emitting layer.
Claim 15
Dependent Claim
17 words
The device of claim 9, wherein said second dielectric layers have a passivation layer additionally disposed thereon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2002-09-20 | 2003-03-22 | 2003-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-20 | 2007-03-22 | 2007-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-20 | 2011-03-22 | 2011-09-21 | $7700.00 | Window Closed / Lapsed |