US4717606A
Expired / Lapsed
US
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Method of fabricating a thin film electroluminescent display panel
Assignee: Boeing North American Inc
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Filing: 1986-05-21
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Granted: 1988-01-05
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Expires: 2006-05-21
Abstract
Abstract A thin film electroluminescent display panel is fabricated by using ion implantation at selected locations in a host layer. By this method, strips of electroluminescent material with different dopants can be created, and these different stripes can be addressed by separate electrodes in order to obtain a multicolor display panel.
Inventors
- 👤 Leonard G. Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:37
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; H05B33/10; C; C09; C09K; C09K2323/00; C09K2323/06; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
83 words
A method of fabricating an alternating current thin film electroluminescent display panel comprising the steps of: depositing a dielectric layer on a transparent substrate having a transparent electrode; depositing a host layer on said dielectric layer; ion implanting dopants into said host layer at a selected location to provide an electroluminescent at said location; annealing the ion-implanted host layer; depositing a second dielectric layer on said ion-implanted host layer; and forming a backside electrode on said second dielectric layer opposite said selected location.
Claim 2
Independent Claim
83 words
A method of fabricating an alternating current thin film electroluminescent display panel comprising the steps of: depositing a dielectric layer on a transparent substrate having a transparent electrode; depositing a host layer on said dielectric layer; ion implanting dopants into said host layer at a selected location to provide an electroluminescent at said location; annealing the ion-implanted host layer; depositing a second dielectric layer on said ion-implanted host layer; and forming a backside electrode on said second dielectric layer opposite said selected location.
Claim 3
Dependent Claim
43 words
The method as claimed in claim 1, including a step of photolithographically forming a pattern having an opening on said host layer whereby said selected location is defined by said opening; and a step of removing said pattern after implanting said dopant ions.
Claim 4
Dependent Claim
13 words
The method as claimed in claim 1 wherein said host layer comprises ZnS.
Claim 5
Dependent Claim
17 words
The method as claimed in claim 1 wherein said selected location comprises stripes on said host layer.
Claim 6
Dependent Claim
39 words
The method as claimed in claim 4, wherein said transparent and said backside electrodes are formed in stripes which cross each other to create rows and columns whereby light emitting pixels are formed between said rows at the crossings.
Claim 7
Dependent Claim
48 words
The method as claimed in claim 1, wherein said host layer is doped with a first dopant to provide a first color during electroluminescence and said selected location is implanted with a second dopant to provide a second color during electroluminescence, whereby a multicolor display panel is formed.
Claim 8
Dependent Claim
43 words
The method as claimed in claim 1 including the step of implanting second dopant ions in a second selected location, said second dopant ions providing a different color than said first mentioned dopant ions during luminescence, whereby a multicolor display panel is formed.
Claim 9
Dependent Claim
46 words
The method as claimed in claim 9 including the step of implanting third dopant ions in a third selected location, said third dopant ions providing a different color than said first mentioned and said second dopant ions during luminescence, whereby a multicolor display panel is formed.
Claim 10
Independent Claim
60 words
A method of fabricating a direct current thin film electroluminescent display panel comprising the steps of: depositing a host layer on a transparent substrate having a transparent electrode; ion implanting dopants into said host layer at a selected location to provide an electroluminescent material at said location; and forming a backside electrode on said host layer at said selected location.
Claim 11
Independent Claim
60 words
A method of fabricating a direct current thin film electroluminescent display panel comprising the steps of: depositing a host layer on a transparent substrate having a transparent electrode; ion implanting dopants into said host layer at a selected location to provide an electroluminescent material at said location; and forming a backside electrode on said host layer at said selected location.
Claim 12
Dependent Claim
13 words
An electroluminescent display panel fabricated by the method as claimed in claim 1.
Claim 13
Dependent Claim
13 words
An electroluminescent display panel fabricated by the method as claimed in claim 9.
Claim 14
Dependent Claim
38 words
An electroluminescent display panel having an active layer with at least two closely spaced regions which have been ion implanted with different dopants to obtain different color electroluminescence, and electrode means for separately addressing each of said regions.
Claim 15
Dependent Claim
38 words
An electroluminescent display panel having an active layer with at least two closely spaced regions which have been ion implanted with different dopants to obtain different color electroluminescence, and electrode means for separately addressing each of said regions.
Claim 16
Dependent Claim
31 words
An electroluminescent display panel as claimed in claim 12 including dielectric layers on both sides of said active layer, whereby said electroluminescent display panel is an alternating current electroluminescent display panel.
Claim 17
Dependent Claim
16 words
An electroluminescent display panel as claimed in claim 12 including a transparent substrate having transparent electrodes.
Claim 18
Dependent Claim
34 words
An electroluminescent display panel as claimed in claim 12 including an opaque substrate, and wherein said electrode means comprises transparent electrode means on the side of said panel which is opposite said opaque substrate.
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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |