US6488555B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode deposition for organic light-emitting devices
Assignee: Cambridge Display Technology Ltd
•
Filing: 2002-02-25
•
Granted: 2002-12-03
•
Expires: 2022-02-25
Abstract
Abstract There is disclosed an organic light-emitting device having at least one layer of light-emissive organic material arranged between first and second electrodes, one of the first and second electrodes being a multilayer structure, each layer of the multilayer structure being a DC magnetron sputtered layer. There is also disclosed an organic light-emitting device having two or more layers of light-emissive organic material arranged between first and second electrodes, an upper most layer of the organic material being more resistant to sputter deposition than an underlying layer of the organic material, and the electrode formed over the upper most layer of organic material being a sputtered layer. There is also disclosed methods for making such structures.
Inventors
- 👤 Karl Pichler
- 👤 Peter Devine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:09
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; H05B33/10; H10; H10K; H10K50/00; H10K50/80; H10K50/805; H10K50/81; H10K50/816; H10K50/82; H10K50/826
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
102 words
A method of fabricating an organic light-emitting device, comprising the steps of: forming a first electrode over a substrate; forming over the first electrode at least one layer of organic material including at least one light-emitting organic layer; forming over the at least one layer of organic material an uppermost layer of organic material that is more resistant to sputter deposition than an underlying layer of organic material; and forming a second electrode over the uppermost layer of organic material; wherein the second electrode comprises at least one layer, the layer adjacent the uppermost layer of organic material being a sputtered layer.
Claim 2
Independent Claim
102 words
A method of fabricating an organic light-emitting device, comprising the steps of: forming a first electrode over a substrate; forming over the first electrode at least one layer of organic material including at least one light-emitting organic layer; forming over the at least one layer of organic material an uppermost layer of organic material that is more resistant to sputter deposition than an underlying layer of organic material; and forming a second electrode over the uppermost layer of organic material; wherein the second electrode comprises at least one layer, the layer adjacent the uppermost layer of organic material being a sputtered layer.
Claim 3
Dependent Claim
75 words
A method of fabricating an organic light-emitting device according to claim 1 , wherein the step of forming the second electrode comprises the steps of sputtering a first layer of conductive material having a low work function over the uppermost layer of organic material and sputtering a second layer of conductive material over the first layer of conductive material, the first layer of conductive material being substantially thinner than the second layer of conductive material.
Claim 4
Dependent Claim
28 words
A method of fabricating an organic light-emitting device according to claim 2 , wherein the first layer of conductive material has a thickness of at most 20 nm.
Claim 5
Dependent Claim
75 words
A method of fabricating an organic light-emitting device according to claim 3 , wherein the step of forming the second electrode comprises the steps of sputtering a first layer of conductive material having a high work function over the uppermost layer of organic material and sputtering a second layer of conductive material over the first layer of conductive material, the first layer of conductive material being substantially thinner than the second layer of conductive material.
Claim 6
Dependent Claim
28 words
A method of fabricating an organic light-emitting device according to claim 4 , wherein the first layer of conductive material has a thickness of less than 10 nm.
Claim 7
Dependent Claim
24 words
A method of fabricating an organic light-emitting device according to claim 1 , wherein the uppermost layer of organic material is a conjugated polymer.
Claim 8
Dependent Claim
85 words
A method of fabricating an organic light-emitting device according to claim 2 , wherein the uppermost layer of organic material is selected from the group consisting of: a) poly (p-phenylene vinylene) or a copolymer thereof; b) poly (thienylene vinylene), poly (p-phenylene) or poly (naphthylene vinylene); c) polyquinoline, polyquinoxaline, polyhydrazine, polypyridine or poly-naphthylpyridine, or a copolymer thereof; d) polyazomethine; e) poly-pyridyl-vinylene or a copolymer thereof; f) an oxadiazole polymer or a copolymer thereof; g) a rigid rod or a ladder-like polymer; and h) a conducting polymer.
Claim 9
Dependent Claim
27 words
A method of fabricating an organic light-emitting device according to claim 7 , wherein the uppermost layer of organic material is a) or b) with non-conjugated sections.
Claim 10
Dependent Claim
28 words
A method fabricating an organic light-emitting device according to claim 4 , wherein the uppermost layer of organic material is f) and is polybenzobisoxazole (PBO) or polybenzobisthiazole (PBT).
Claim 11
Dependent Claim
31 words
A method of fabricating an organic light-emitting device according to claim 4 , wherein the uppermost layer of organic materials is h) and is polyaniline, polyethylenedioxythiophene or doped poly (p-phenylene vinylene).
Claim 12
Independent Claim
28 words
A method of fabricating an organic light-emitting device according to any of claims 7 - 10 , wherein the underlying layer of organic material is a conjugated polymer.
Claim 13
Independent Claim
36 words
A method of fabricating an organic light-emitting device according to any of claims 9 to 10 , wherein the underlying layer of organic material is a soluble derivative of poly (p-phenylene vinylene) with di-alkoxy side chains.
Claim 14
Dependent Claim
25 words
A method of fabricating an organic light-emitting device according to claim 12 , wherein the underlying layer of organic material is poly [2-methoxy, 5-(2′-ethyl-hexyloxy)-p-phenylene vinylene].
Claim 15
Independent Claim
30 words
A method of fabricating an organic light-emitting device according to any of claims 7 to 10 , wherein the underlying layer of organic material is a low molecular weight compound.
Claim 16
Independent Claim
40 words
A method of fabricating an organic light-emitting device according to any of claims 7 to 10 , wherein the uppermost layer of organic material is substantially thinner than the total thickness of the underlying layer or layers of organic material.
References Cited (Backward Citations)
US4539507A
Cited
EP0278757A2
Cited
US5126802A
Cited
US5006915A
Cited
US5247190A
Cited
EP0443861B1
Cited
US5059862A
Cited
EP0468438A2
Cited
EP0468437A2
Cited
EP0468439A2
Cited
US5059861A
Cited
US5047687A
Cited
EP0549345A2
Cited
EP0553950A2
Cited
EP0563009A1
Cited
US5399936A
Cited
EP0605739A1
Cited
WO1994003031A1
Cited
US5807627A
Cited
US5428884A
Cited
JPH0785973A
Cited
JPH07150137A
Cited
US5723873A
Cited
WO1995024056A1
Cited
US5747930A
Cited
EP0684753A1
Cited
US5558904A
Cited
US5857886A
Cited
JPH08264278A
Cited
JPH0935871A
Cited
US6402579B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-12-02 | 2006-06-03 | 2006-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-02 | 2010-06-03 | 2010-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-02 | 2014-06-03 | 2014-12-03 | $7700.00 | Window Closed / Lapsed |