EP0159531A1
Expired / Lapsed
EP
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Thin film EL panel
Assignee: Panasonic Holdings Corp
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Filing: 1985-03-18
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Granted: —
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Expires: 2005-03-18
Abstract
Abstract New black color insulator thin films comprising Pr oxide, composite oxides of Pr-Mn, Pr-Ni, Pr-Co or Mn oxide are used to constitute at least one part or all parts of interface film between a phosphor film and a back electrode film of an AC thin film EL panel; and the panel with such a high contrast as 5:1 even at an illumination of 400 lux has been obtained.
Inventors
- 👤 Tomizo Matsuoka
- 👤 Masahiro Nishikawa
- 👤 Yosuke Fujita
- 👤 Atsushi Abe
- 👤 Tsuneharu Nitta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 09:51
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/08; C23C28/00; H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
71 words
A thin film EL panel comprising a transparent electrode film, a phosphor film formed above said transparent electrode film, a thin insulator film which is formed on said phosphor film and at least a part thereof is a thin film of an oxide selected from a group consisting of Pr oxide, composite oxides of Pr-Mn, Pr-Co and Pr-Ni and Mn oxide, and a back electrode formed on said thin insulator film.
Claim 2
Dependent Claim
71 words
A thin film EL panel comprising a transparent electrode film, a phosphor film formed above said transparent electrode film, a thin insulator film which is formed on said phosphor film and at least a part thereof is a thin film of an oxide selected from a group consisting of Pr oxide, composite oxides of Pr-Mn, Pr-Co and Pr-Ni and Mn oxide, and a back electrode formed on said thin insulator film.
Claim 3
Dependent Claim
23 words
A thin film EL panel in accordance with claim 1, wherein said Pr oxide thin film is an evaporation film or sputtered film.
Claim 4
Dependent Claim
25 words
A thin film EL panel in accordance with claim 1, wherein said Pr-Mn composite oxide film has Pr/Pr+Mn atom ratio of over 0.35 and more.
Claim 5
Dependent Claim
24 words
A thin film EL panel in accordance with claim 1, wherein Pr-Co composite oxide film has Pr/Pr+Co atom ratio of from 0.1 to 0.6.
Claim 6
Dependent Claim
24 words
A thin film EL panel in accordance with claim 1, wherein Pr-Ni composite oxide film has Pr/Pr+Ni atom ratio of from 0.2 to 0.7.
Claim 7
Dependent Claim
79 words
Method for manufacturing a thin film EL panel comprising the steps of forming on a substrate a transparent electrode film, forming a phosphor film formed above said transparent electrode film, forming a thin insulator film on said phosphor film, at least a part thereof being a thin film of an oxide selected from a group consisting of Pr oxide, composite oxides of Pr-Mn, Pr-Co and Pr-Ni and Mn oxide, and forming a back electrode on said thin insulator film.
Claim 8
Dependent Claim
79 words
Method for manufacturing a thin film EL panel comprising the steps of forming on a substrate a transparent electrode film, forming a phosphor film formed above said transparent electrode film, forming a thin insulator film on said phosphor film, at least a part thereof being a thin film of an oxide selected from a group consisting of Pr oxide, composite oxides of Pr-Mn, Pr-Co and Pr-Ni and Mn oxide, and forming a back electrode on said thin insulator film.
Claim 9
Dependent Claim
54 words
Method for manufacturing a thin film EL panel in accordance with claim 6, wherein said thin insulator film is formed by sputtering or evaporation of Pr metal, metals of Pr-Mn, Pr-Co or Pr-Ni, or oxide or composite oxide thereof by using a lump of such materials as target/ evaporation source, in an oxidizing atmosphere.
Claim 10
Dependent Claim
43 words
Method for manufacturing a thin film EL panel in accordance with claim 6, wherein said thin insulator film is formed by sputtering or evaporation of metals of Pr-Mn, Pr-Co or Pr-Ni by using a lump of such materials as target/evaporation source in Ar.
Claim 11
Dependent Claim
30 words
Method for manufacturing a thin film EL panel in accordance with claim 6, 7 or 8, wherein said Pr-Mn composite oxide film has Pr/Pr+Mn atom ratio of 0.35 and more.
Claim 12
Dependent Claim
30 words
Method for manufacturing a thin film EL panel in accordance with claim 6, 7 or 8, wherein Pr-Co composite oxide film has Pr/Pr+Co atom ratio of from 0.1 to 0.6.
Claim 13
Dependent Claim
30 words
Method for manufacturing a thin film EL panel in accordance with claim 6, 7 or 8, wherein Pr-Ni composite oxide film has Pr/Pr+Ni atom ratio of from 0.2 to 0.7.
References Cited (Backward Citations)
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