US5958610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
El element having a color filter formed on an upper electrode
Assignee: Denso Corp
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Filing: 1997-02-20
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Granted: 1999-09-28
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Expires: 2017-02-20
Abstract
Abstract An EL element having a color filter formed on an upper electrode thereof enables a decrease in the pixel loss or line defects. In the EL element, a lower transparent electrode, first insulating layer, luminescent layer and upper transparent electrode are laminated on a glass substrate. Further, a color filter is formed on the upper transparent electrode. As the color filter there is used a posi-resist having an average molecular weight in a range of from 100 to 50000 or a nega-resist having a polymerization reaction percentage in a range of from 5% to 70%.
Inventors
- 👤 Tomohiro Yonekawa
- 👤 Hironobu Tamura
- 👤 Yutaka Hattori
- 👤 Nobuei Ito
- 👤 Tadashi Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:12
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; H05B33/10; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
65 words
An EL element comprising an insulating substrate and a lower electrode, insulating layer, luminescent layer and upper transparent electrode laminated directly or indirectly on said insulating substrate, said EL element further comprising a color filter made of organic material and formed on and directly contacting said upper transparent electrode, said organic material having an average molecular weight in a range of from 100 to 50000.
Claim 2
Dependent Claim
65 words
An EL element comprising an insulating substrate and a lower electrode, insulating layer, luminescent layer and upper transparent electrode laminated directly or indirectly on said insulating substrate, said EL element further comprising a color filter made of organic material and formed on and directly contacting said upper transparent electrode, said organic material having an average molecular weight in a range of from 100 to 50000.
Claim 3
Dependent Claim
25 words
An EL element as set forth in claim 1, wherein said average molecular weight of said organic material is equal to or less than 10000.
Claim 4
Dependent Claim
35 words
An EL element as set forth in claim 1, wherein said organic material becomes alkali-soluble by radiation of light thereonto so that light-radiated portions are etchable with an alkaline etchant to pattern said color filter.
Claim 5
Dependent Claim
21 words
An EL element as set forth in claim 1, wherein said color filter has a thickness of 2 μm or less.
Claim 6
Dependent Claim
25 words
An EL element as set forth in claim 1, wherein said color filter has a thickness that ran between 0.1 μm and 2 μm inclusive.
Claim 7
Independent Claim
87 words
A method of manufacturing an EL element, comprising steps of: preparing an insulating substrate; laminating a lower electrode, insulating layer, luminescent layer and upper transparent electrode directly or indirectly on said insulating substrate; and forming on, and directly contacting said upper transparent electrode, a color filter which is made of organic material, wherein the step of forming said color filter includes a step of heating said color filter to cause said organic material to have an average molecular weight within a range of from 100 to 50000.
Claim 8
Independent Claim
87 words
A method of manufacturing an EL element, comprising steps of: preparing an insulating substrate; laminating a lower electrode, insulating layer, luminescent layer and upper transparent electrode directly or indirectly on said insulating substrate; and forming on, and directly contacting said upper transparent electrode, a color filter which is made of organic material, wherein the step of forming said color filter includes a step of heating said color filter to cause said organic material to have an average molecular weight within a range of from 100 to 50000.
Claim 9
Dependent Claim
35 words
A method of manufacturing an EL element as set forth in claim 6, wherein said heating step heats said color filter at a heating temperature in a range of from 20° C. to 180° C.
Claim 10
Dependent Claim
28 words
A method of manufacturing an EL element as set forth in claim 6, wherein said organic material has a property of becoming alkali-soluble by radiation of light thereonto.
Claim 11
Dependent Claim
25 words
A method of manufacturing an EL element as set forth in claim 6, wherein said color filter has a thickness of 2 μm or less.
Claim 12
Dependent Claim
29 words
A method of manufacturing an EL element as set forth in claim 6, wherein said color filter has a thickness that ranges between 0.1 μm and 2 μm inclusive.
Claim 13
Independent Claim
143 words
A method of manufacturing an EL panel, comprising steps of preparing an insulating substrate; laminating a lower electrode, insulating layer, luminescent layer and upper transparent electrode directly or indirectly on said insulating substrate; forming on, and directly contacting said upper transparent electrode, a color filter which is made of organic material to form an EL element, the step of forming said color filter including a step of heating said color filter to cause said organic material to have an average molecular weight within a range of from 100 to 50000; and bonding said EL element and an opposing substrate to each other with bonding agent, said bonding agent being hardened by being subject to a thermo-setting temperature which is set to be at a temperature that is equal to or lower than a heating temperature of said step of heating said color filter.
Claim 14
Independent Claim
143 words
A method of manufacturing an EL panel, comprising steps of preparing an insulating substrate; laminating a lower electrode, insulating layer, luminescent layer and upper transparent electrode directly or indirectly on said insulating substrate; forming on, and directly contacting said upper transparent electrode, a color filter which is made of organic material to form an EL element, the step of forming said color filter including a step of heating said color filter to cause said organic material to have an average molecular weight within a range of from 100 to 50000; and bonding said EL element and an opposing substrate to each other with bonding agent, said bonding agent being hardened by being subject to a thermo-setting temperature which is set to be at a temperature that is equal to or lower than a heating temperature of said step of heating said color filter.
Claim 15
Dependent Claim
85 words
An EL element comprising: an insulating substrate; a lower electrode formed on said insulating substrate; a first insulating layer formed on said lower electrode; a luminescent layer formed on said first insulating layer; a second insulating layer formed on said luminescent layer; an upper electrode formed on said second insulating layer; and a color filter formed on and directly contacting said upper electrode, said color filter being made of organic material and having an average molecular weight in a range of from 100 to 50000.
Claim 16
Dependent Claim
85 words
An EL element comprising: an insulating substrate; a lower electrode formed on said insulating substrate; a first insulating layer formed on said lower electrode; a luminescent layer formed on said first insulating layer; a second insulating layer formed on said luminescent layer; an upper electrode formed on said second insulating layer; and a color filter formed on and directly contacting said upper electrode, said color filter being made of organic material and having an average molecular weight in a range of from 100 to 50000.
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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) | 2002-09-27 | 2003-03-29 | 2003-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-09-27 | 2007-03-29 | 2007-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-09-27 | 2011-03-29 | 2011-09-28 | $7700.00 | Window Closed / Lapsed |