Light Emitting Device
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Abstract
It is an object of the present invention to provide a light-emitting device in which, even when a material with high reflectivity such as aluminum is used for an electrode, a layer containing oxygen can be formed over the electrode without increasing contact resistance and a manufacturing method thereof. According to the present invention, a feature thereof is a light-emitting element having an electrode composed of a stacked structure where a conductive film having high reflectivity such as aluminum, silver, and an alloy containing aluminum or an alloy containing silver, and a conductive film composed of a refractory metal material is provided over the conductive film, or a light-emitting device having the light-emitting element.
91 Citations
56 Claims
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1-30. -30. (canceled)
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31. A light-emitting device comprising:
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a first electrode comprising a first conductive film and a second conductive film wherein the first conductive film is formed over the second conductive film; a layer comprising a metal oxide on and in contact with the first conductive film; and a second electrode formed over the layer, wherein the first conductive film comprises a refractory metal material, and wherein the second conductive film comprises a metal and is light reflective. - View Dependent Claims (32, 33, 34, 35, 36)
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37. A light-emitting device comprising:
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a first electrode comprising a first conductive film and a second conductive film wherein the first conductive film is formed over the second conductive film; a layer comprising a metal oxide on and in contact with the first conductive film; and a second electrode having reflectiveness formed over the layer, wherein the first conductive film comprises a refractory metal material, wherein the second conductive film comprises a metal and is light reflective, and wherein the second electrode has a film thickness that transmits light from the layer. - View Dependent Claims (38, 39, 40, 41, 42)
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43. A light-emitting device having at least first, second and third light-emitting elements, each of the first, second and third light-emitting elements comprising:
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a first electrode comprising a first conductive film and a second conductive film wherein the first conductive film is formed over the second conductive film; a layer comprising a metal oxide on and in contact with the first conductive film; and a second electrode formed over the layer, wherein the first conductive film comprises a refractory metal material, wherein the first light-emitting element emits red light, the second light-emitting element emits green light, and the third light-emitting element emits blue light, wherein the second conductive film comprises a metal and is light reflective, and wherein a film thickness of the layer of each of the first, second and third light-emitting elements is different. - View Dependent Claims (44, 45, 46, 47, 48)
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49. A light-emitting device comprising:
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a semiconductor film formed over an insulating substrate; a wiring connected to an impurity region in the semiconductor film; a first electrode comprising a first conductive film and a second conductive film, the first electrode being connected to the wiring wherein the first conductive film is formed over the second conductive film; a layer comprising a metal oxide on and in contact with the first conductive film; and a second electrode formed over the layer, wherein the first conductive film comprises a refractory metal material, and wherein the second conductive film comprises a metal and is light reflective. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56)
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Specification