Capacitive input device, display device with input function, and electronic apparatus

摘要

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.

主权项

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, 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.