Thin-film transistor with channel layer formed by metal oxide film including indium, and method of manufacturing the same
First Claim
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1. A thin-film transistor comprising respective elements of:
- three electrodes of a source electrode, a drain electrode and a gate electrode;
a channel layer; and
a gate insulating film, wherein the channel layer is formed by indium oxide to which titanium or tungsten is doped.
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Abstract
In a thin-film transistor comprising respective elements of: three electrodes of a source electrode, a drain electrode and a gate electrode; a channel layer; and a gate insulating film, at least the channel layer is formed by a metal oxide film including indium. Therefore, it is possible to obtain the thin-film transistor, which can manufacture an element to a polymer substrate without using a high temperature process and which can achieve a high performance and a high reliability at low cost.
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Citations
7 Claims
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1. A thin-film transistor comprising respective elements of:
- three electrodes of a source electrode, a drain electrode and a gate electrode;
a channel layer; and
a gate insulating film, wherein the channel layer is formed by indium oxide to which titanium or tungsten is doped. - View Dependent Claims (2, 3, 4)
- three electrodes of a source electrode, a drain electrode and a gate electrode;
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5. A method of manufacturing a thin-film transistor comprising:
- forming an indium oxide film, to which titanium or tungsten is doped, and having a predetermined pattern on a substrate by effecting a sputtering process by means of a sintered body of indium oxide, to which titanium or tungsten is doped, as a target, under an atmosphere including oxygen gas, so that the channel layer and at least one electrodes of the source electrode, the drain electrode and the gate electrode are formed by the indium oxide film, to which titanium or tungsten is doped;
wherein two or more indium oxide films, to which titanium or tungsten is doped, having different electric resistivity are formed by varying a flow rate of oxygen gas, so that the channel layer and at least one of the respective electrodes are formed. - View Dependent Claims (6, 7)
- forming an indium oxide film, to which titanium or tungsten is doped, and having a predetermined pattern on a substrate by effecting a sputtering process by means of a sintered body of indium oxide, to which titanium or tungsten is doped, as a target, under an atmosphere including oxygen gas, so that the channel layer and at least one electrodes of the source electrode, the drain electrode and the gate electrode are formed by the indium oxide film, to which titanium or tungsten is doped;
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