US Patent 7791082 Semiconductor apparatus and method of manufacturing the same

It is an object of the present invention to provide a technology of controlling a threshold voltage of a thin film transistor in which an amorphous oxide film is applied to a channel layer. There is provided a semiconductor apparatus including a plurality of kinds of transistors, each of the plurality of kinds of transistors including a channel layer made of an amorphous oxide containing a plurality of kinds of metal elements; and threshold voltages of the plurality of kinds of transistors are different from one another by changing an element ratio of the amorphous oxide.