Stabilized electrodes in electroluminescent displays
First Claim
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1. An encapsulated electrode for an electroluminescent display incorporating a thick film dielectric layer, said electrode comprising;
- an electrode layer comprising an electrically conductive metallic film having an upper and lower surface;
a thick film dielectric layer adjacent said upper surface of said electrode layer;
a layer of encapsulating material provided between said upper surface of said electrode layer and said thick film dielectric layer, and a layer of encapsulating material provided on said lower surface of said electrode, said material reducing the risk of the electrode from becoming discontinuous and losing its electrical conductivity, said encapsulating material on said upper and lower surface having a thickness of about 10 nm to about 500 nm, said encapsulating material on said lower surface is being selected from barium titanate and indium tin oxide.
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Abstract
The invention relates to improving the stability of the lower electrodes in an electroluminescent display employing a thick film dielectric. The invention is an encapsulated electrode comprising an electrode of an electrically conductive metallic film. A layer of encapsulating material is provided on an upper and/or lower surface of the electrode layer. The encapsulating material reduces the risk of the electrode from becoming discontinuous and losing its electrical conductivity.
11 Citations
66 Claims
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1. An encapsulated electrode for an electroluminescent display incorporating a thick film dielectric layer, said electrode comprising;
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an electrode layer comprising an electrically conductive metallic film having an upper and lower surface;
a thick film dielectric layer adjacent said upper surface of said electrode layer;
a layer of encapsulating material provided between said upper surface of said electrode layer and said thick film dielectric layer, and a layer of encapsulating material provided on said lower surface of said electrode, said material reducing the risk of the electrode from becoming discontinuous and losing its electrical conductivity, said encapsulating material on said upper and lower surface having a thickness of about 10 nm to about 500 nm, said encapsulating material on said lower surface is being selected from barium titanate and indium tin oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A thick film dielectric electroluminescent display having a thick film dielectric layer and an encapsulated lower electrode, said display comprising;
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an electrode layer comprising an electrically conductive metallic film having an upper and lower surface;
a thick film dielectric layer adjacent said upper surface of said electrode layer;
an encapsulating material provided on said lower surface of said electrode, said encapsulating material minimizing the electrode from becoming discontinuous and losing its electrical conductivity. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method for stabilizing an electrode having an upper and lower surface within a thick film dielectric electroluminescent display having a thick film dielectric layer, said method comprising;
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providing a layer of encapsulating material between said upper surface of said electrode and said thick film dielectric layer; and
providing a layer of encapsulating material on said lower surface of said electrode, said encapsulating material on said upper and lower surface having a thickness of about 10 nm to about 500 nm and wherein said encapsulating material on said lower surface is selected from barium titanate and indium tin oxide, said encapsulating material reducing the risk of the electrode from becoming discontinuous and losing its electrical conductivity. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A stabilized electrode comprising;
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an electrically conductive gold film layer having an upper surface and a lower surface, said gold film having a thickness of about 100 nm to about 1000 nm;
a thick film dielectric layer provided adjacent said upper surface;
a layer of indium tin oxide provided between said thick film dielectric layer and said upper surface of said gold film layer having a thickness of about 20 nm to about 500 nm; and
a layer of indium tin oxide provided on the lower surface of said gold layer having a thickness of about 10 nm to about 60 nm;
wherein said stabilized electrode is present within a thick film dielectric electroluminescent display.
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60. A stabilized electrode comprising;
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an electrically conductive gold film layer having an upper surface and a lower surface, said gold film layer having a thickness of about 100 nm to about 1000 nm;
a thick film dielectric layer provided adjacent said upper surface;
a layer of barium titanate having a thickness of about 20 nm to about 500 nm provided between said thick film dielectric layer and said upper surface of said gold layer; and
a layer of barium titanate having a thickness of about 10 nm to about 60 nm provided on the lower surface of said gold layer;
wherein said stabilized electrode is present within a thick film dielectric electroluminescent display.
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61. A stabilized electrode for a thick film dielectric electroluminescent display, said electrode comprising;
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an electrically conductive gold film layer having an upper surface and a lower surface, said gold film having a thickness of about 100 nm to about 1000 nm;
a thick film dielectric layer provided adjacent said upper surface;
a layer of indium tin oxide provided between said thick film dielectric layer and said upper surface of said gold film layer and a layer of indium tin oxide provided on the lower surface of said gold film layer.
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62. A stabilized electrode for a thick film dielectric electroluminescent display, the electrode comprising;
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an electrically conductive gold film layer having an upper surface and a lower surface, said gold film layer having a thickness of about 100 nm to about 1000 nm;
a thick film dielectric layer provided adjacent said upper surface;
a layer of barium titanate provided between the upper surface and said thick film dielectric layer and a layer of barium titanate provided on the lower surface of said gold layer.
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63. A stabilized electrode for a thick film dielectric electroluminescent display, the electrode comprising;
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an electrically conductive gold film layer having an upper surface and a lower surface, said gold film layer having a thickness of about 100 nm to about 1000 nm;
a thick film dielectric layer provided adjacent said upper surface;
a layer of indium tin oxide provided between said upper surface of said gold layer and said thick film dielectric layer, said layer of indium tin oxide having a thickness of about 10 nm to about 500 nm. - View Dependent Claims (64, 65, 66)
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Specification