Patent US4603280A successfully refreshed from Google Patents.
US4603280A
Expired / Lapsed
US
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Electroluminescent device excited by tunnelling electrons
Assignee: RCA Corp
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Filing: 1984-10-30
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Granted: 1986-07-29
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Expires: 2004-10-30
Abstract
Abstract An electroluminescent device comprising a composite structure including first and second electrodes, first and second electroluminescent layers between said electrodes, and an electrically-insulating layer between and contacting both of the electroluminescent layers, said electrically-insulating layer having a substantially-uniform thickness in a range that permits substantial tunnelling of electrons therethrough when as little as 10 to 30 volts are applied across said electrodes.
Inventors
- 👤 Jaques I. Pankove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:23
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
An electroluminescent device comprising a composite structure including first and second electrode layers, first and second electroluminescent layers between said electrode layers, and an electrically-insulating layer between and contacting both of said electroluminescent layers, said electrically-insulating layer having a substantially-uniform thickness in a range of up to 300 Å and permits substantial tunnelling of electrons therethrough when as little as 10 to 30 volts are applied across said electrode layers.
Claim 2
Dependent Claim
70 words
An electroluminescent device comprising a composite structure including first and second electrode layers, first and second electroluminescent layers between said electrode layers, and an electrically-insulating layer between and contacting both of said electroluminescent layers, said electrically-insulating layer having a substantially-uniform thickness in a range of up to 300 Å and permits substantial tunnelling of electrons therethrough when as little as 10 to 30 volts are applied across said electrode layers.
Claim 3
Dependent Claim
23 words
The device defined in claim 1 wherein the thickness of said electrically-insulating layer is in the range of about 100 to 300 Å.
Claim 4
Dependent Claim
47 words
The device defined in claim 2 wherein said electrically-insulating layer consists essentially of at least one member of the group consisting of Y 2 O 3 , Si 3 N 4 , SiO 2 , Al 2 O 3 , BaTiO 3 , and TaO 2 .
Claim 5
Dependent Claim
18 words
The device defined in claim 2 wherein said electrically-insulating layer consists essentially of Y 2 O 3 .
Claim 6
Dependent Claim
23 words
The device defined in claim 1 wherein the thicknesses of said electroluminescent layers are in the range of about 200 to 3,000 Å.
Claim 7
Dependent Claim
16 words
The device defined in claim 5 wherein said electroluminescent layers have substantially identical compositions and thicknesses.
Claim 8
Dependent Claim
20 words
The device defined in claim 5 wherein said electroluminescent layers consist essentially of binder-free layers of inorganic metal-ion-activated host material.
Claim 9
Dependent Claim
21 words
The device defined in claim 5 wherein said electroluminescent layers consist essentially of zinc sulfide host material activated with manganese cations.
Claim 10
Dependent Claim
32 words
The device defined in claim 1 including means for applying across said electrodes voltages in the range of 10 to 100 volts at frequencies in the range of 50 to 10,000 hertz.
Claim 11
Dependent Claim
32 words
The device defined in claim 4 including means for applying across said electrodes voltages in the range of 10 to 60 volts at frequencies in the range of 50 to 10,000 hertz.
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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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |