US5133036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin-film matrix structure for an electroluminescent display in particular
Assignee: Planar Systems Oy
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Filing: 1991-06-11
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Granted: 1992-07-21
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Expires: 2011-06-11
Abstract
Abstract The present invention relates to a thin-film matrix structure particularly suitable for electroluminescent displays, said structure comprising a substrate (7) capable of supporting the thin-film structure to be fabricated, a first electrode structure (9) formed onto the substrate (1), said structure being comprised of elongated parallel electrode conductors, a luminescent multilayered thin-film structure (10, 11, 12) formed onto the first electrode structure (9), and a second, transparaent electrode structure (13, 14) formed on said luminescent multilayered thin-film structure (10, 11, 12), said second electrode structure comprising elongated parallel electrode conductors which are aligned essentially orthogonally to the electrode conductors of the first electrode structure (9). According to the invention, the first electrode structure (9) is formed as a layer of metallic or metal alloy composition, and each transparent electrode conductor (13) of the second electrode structure (13, 14) is provided with a narrow stripe (14) of high electrical conductivity, whereby said stripe in itself need not be transparent. The structure in accordance with the invention provides reduced power consumption.
Inventors
- 👤 Runar Tornqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:20
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
186 words
A thin-film matrix structure for an electroluminescent display in particular, said structure comprising: a substrate (7) capable of supporting the thin-film structure to be fabricated; a first electrode structure (9) formed onto the substrate (7), said structure being comprised of elongated parallel electrode conductors; a luminescent multilayered thin-film structure (10, 11, 12) formed onto the first electrode structure (9); a second, transparent electrode structure (13, 14) formed on said luminescent multilayered thin-film structure (10, 11, 12), said second electrode structure comprising elongated parallel electrode conductors which are aligned essentially orthogonally to the electrode conductors of the first electrode structure (9) characterized in that: the first electrode structure (9) has an at least partially metallic or metal alloy composition so as to minimize the resistance of the parallel conductors; and a metallic stripe (14) of high electrical conductivity is associated with and being substantially narrower than each second transparent electrode conductor (13) to improve the conductivity of each transparent electrode such that the stripe in itself need not be transparent and light emitted from the structure may be viewed from the transparent electrode side of the structure.
Claim 2
Dependent Claim
186 words
A thin-film matrix structure for an electroluminescent display in particular, said structure comprising: a substrate (7) capable of supporting the thin-film structure to be fabricated; a first electrode structure (9) formed onto the substrate (7), said structure being comprised of elongated parallel electrode conductors; a luminescent multilayered thin-film structure (10, 11, 12) formed onto the first electrode structure (9); a second, transparent electrode structure (13, 14) formed on said luminescent multilayered thin-film structure (10, 11, 12), said second electrode structure comprising elongated parallel electrode conductors which are aligned essentially orthogonally to the electrode conductors of the first electrode structure (9) characterized in that: the first electrode structure (9) has an at least partially metallic or metal alloy composition so as to minimize the resistance of the parallel conductors; and a metallic stripe (14) of high electrical conductivity is associated with and being substantially narrower than each second transparent electrode conductor (13) to improve the conductivity of each transparent electrode such that the stripe in itself need not be transparent and light emitted from the structure may be viewed from the transparent electrode side of the structure.
Claim 3
Dependent Claim
29 words
A thin-film matrix structure according to claim 1, characterized in that said stripe (14) is at least partially fabricated of cooper (Cu), aluminum (Al), silver (Ag) or gold (Au).
Claim 4
Dependent Claim
42 words
A thin-film matrix structure according to claim 2, characterized in that said stripe (14) is formed as a chromium bonding layer of approximately 20 nm thickness, on which bonding layer a cooper or aluminum layer of approximately 1 μm thickness is deposited.
Claim 5
Dependent Claim
56 words
A thin-film matrix structure according to claim 1, characterized in that said first electrode structure (9) is mainly formed of a metal such as molybdenum (Mo), tungsten (W), tantalum (Ta), nickel (Ni), titanium (Ti), cobalt (Co) or a similar metal or an alloy thereof that has substantially no reactiveness with any of the layers formed thereafter.
Claim 6
Dependent Claim
42 words
A thin-film matrix structure according to claim 1, characterized in that said first electrode structure (9) is mainly formed of a metal of a high electrical conductivity such as gold (Au), silver (Ag), aluminum (Al) or copper (Cu) or an alloy thereof.
Claim 7
Dependent Claim
34 words
A thin-film matrix structure according to claim 5, characterized in that said first electrode structure (9) includes a passivation and protective layer (16) atop the metallic first electrode structure with the high electrical conductivity.
Claim 8
Dependent Claim
28 words
A thin-film matrix structure according to claim 1, characterized in that said second electrode structure (13) is formed from a metallic film of thickness less than 50 nm,
Claim 9
Dependent Claim
43 words
A thin-film matrix structure according to claim 7, characterized in that said second electrode structure (13 . . . 16) is formed from the group consisting of aluminum (Al) chromium (Cr), gold (Au), nickel (Ni) or a similar metal or an alloy thereof.
Claim 10
Dependent Claim
35 words
A thin-film matrix structure according to claim 1, characterized in that said second electrode structure (13) is formed of the group consisting of indium-tin oxide (ITO), tin oxide (SnO 2 ) or zinc oxide (ZnO).
Claim 11
Dependent Claim
24 words
A matrix thin-film structure according to claim 1, characterized in that at least one of the thin-film structures is fabricated using the ALE technique.
Claim 12
Dependent Claim
38 words
A matrix thin-film structure according to claim 1, characterized in that said first electrode structure (9) is designed to perform as the column electrode structure, while said second electrode structure (13), correspondingly, performs as the row electrode structure.
References Cited (Backward Citations)
US4327962A
Cited
US4693549A
Cited
US4950044A
Cited
US5035479A
Cited
US4946243A
Cited
US4943133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |