Capacitive input device, display device with input function, and electronic apparatus
First Claim
Patent Images
1. A capacitive input device comprising:
- a light-transmitting substrate;
a multilayer film formed on one of the surfaces of the light-transmitting substrate and including a plurality of light-transmitting thin films which have different refractive indexes and one of which is a niobium oxide film;
a plurality of first light-transmitting electrodes formed on the multilayer film in an input region of the light-transmitting substrate to extend in a first direction; and
a plurality of second light-transmitting electrodes formed on the multilayer film in the input region of the light-transmitting substrate to extend in a second direction crossing the first direction, wherein at each of the intersections between the first light-transmitting electrodes and the second light-transmitting electrodes, either the first or second light-transmitting electrodes are continuous with each other, while the other of the first or second light-transmitting electrodes are discontinuous with each other, wherein a light-transmitting interlayer insulation film consisting of an acrylic resin is formed on the continuous light-transmitting electrodes at each of the intersections, and a light-transmitting relay electrode consisting of ITO and having a film thickness smaller than that of the first and second light-transmitting electrodes is formed on the interlayer insulation film in order to electrically connect the other discontinuous light-transmitting electrodes at each intersection, andwherein the light-transmitting substrate is a glass substrate;
the first light-transmitting electrodes and the second light-transmitting electrodes are composed of an ITO film; and
the multilayer film includes the niobium oxide film formed on the light-transmitting substrate and a silicon oxide film laminated on the niobium oxide film;
wherein the niobium oxide film has a thickness of 4 nm to 6 nm and a refractive index of 2.22 to 2.37;
the silicon oxide film has a thickness of 52 nm to 60 nm or 70 nm to 78 nm and a refractive index of 1.425 to 1.49; and
the ITO film has a thickness of 17 nm to 23 nm and a refractive index of 1.87 to 1.945.
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Abstract
A capacitive input device includes a light-transmitting substrate, a multilayer film formed on one of the surfaces of the light-transmitting substrate and including a plurality of light-transmitting thin films which have different refractive indexes and one of which is a niobium oxide film, a plurality of first light-transmitting electrodes formed on the multilayer film in an input region of the light-transmitting substrate to extend in a first direction, and a plurality of second light-transmitting electrodes formed on the multilayer film in the input region of the light-transmitting substrate to extend in a second direction crossing the first direction.
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Citations
12 Claims
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1. A capacitive input device comprising:
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a light-transmitting substrate; a multilayer film formed on one of the surfaces of the light-transmitting substrate and including a plurality of light-transmitting thin films which have different refractive indexes and one of which is a niobium oxide film; a plurality of first light-transmitting electrodes formed on the multilayer film in an input region of the light-transmitting substrate to extend in a first direction; and a plurality of second light-transmitting electrodes formed on the multilayer film in the input region of the light-transmitting substrate to extend in a second direction crossing the first direction, wherein at each of the intersections between the first light-transmitting electrodes and the second light-transmitting electrodes, either the first or second light-transmitting electrodes are continuous with each other, while the other of the first or second light-transmitting electrodes are discontinuous with each other, wherein a light-transmitting interlayer insulation film consisting of an acrylic resin is formed on the continuous light-transmitting electrodes at each of the intersections, and a light-transmitting relay electrode consisting of ITO and having a film thickness smaller than that of the first and second light-transmitting electrodes is formed on the interlayer insulation film in order to electrically connect the other discontinuous light-transmitting electrodes at each intersection, and wherein the light-transmitting substrate is a glass substrate; the first light-transmitting electrodes and the second light-transmitting electrodes are composed of an ITO film; and the multilayer film includes the niobium oxide film formed on the light-transmitting substrate and a silicon oxide film laminated on the niobium oxide film; wherein the niobium oxide film has a thickness of 4 nm to 6 nm and a refractive index of 2.22 to 2.37; the silicon oxide film has a thickness of 52 nm to 60 nm or 70 nm to 78 nm and a refractive index of 1.425 to 1.49; and the ITO film has a thickness of 17 nm to 23 nm and a refractive index of 1.87 to 1.945. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A capacitive input device comprising:
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a light-transmitting substrate; a multilayer film formed on one of the surfaces of the light-transmitting substrate and including a plurality of light-transmitting thin films which have different refractive indexes and one of which is a niobium oxide film; a plurality of first light-transmitting electrodes formed on the multilayer film in an input region of the light-transmitting substrate to extend in a first direction; and a plurality of second light-transmitting electrodes formed on the multilayer film in the input region of the light-transmitting substrate to extend in a second direction crossing the first direction, wherein at each of the intersections between the first light-transmitting electrodes and the second light-transmitting electrodes, either the first or second light-transmitting electrodes are continuous with each other, while the other of the first or second light-transmitting electrodes are discontinuous with each other, wherein a light-transmitting interlayer insulation film consisting of an acrylic resin is formed on the continuous light-transmitting electrodes and discontinuous light-transmitting electrodes over at least substantially the entire surface of the light-transmitting substrate, the light-transmitting interlayer insulation film including contact holes at each of the intersections, wherein a light-transmitting relay electrode consisting of ITO and having a film thickness smaller than that of the first and second light-transmitting electrodes is formed in the contact holes of the interlayer insulation film in order to electrically connect the other discontinuous light-transmitting electrodes at each intersection, and wherein the light-transmitting substrate is a glass substrate; the first light-transmitting electrodes and the second light-transmitting electrodes are composed of an ITO film; and the multilayer film includes the niobium oxide film formed on the light-transmitting substrate and a silicon oxide film laminated on the niobium oxide film; wherein the niobium oxide film has a thickness of 4 nm to 6 nm and a refractive index of 2.22 to 2.37; the silicon oxide film has a thickness of 52 nm to 60 nm or 70 nm to 78 nm and a refractive index of 1.425 to 1.49; and the ITO film has a thickness of 17 nm to 23 nm and a refractive index of 1.87 to 1.945.
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Specification