Patent ID: 8237166

Claim:
An active matrix display comprising: an electroluminescent device; and a field effect transistor for driving the electroluminescent device having an active layer, wherein the active layer of the field effect transistor comprises an amorphous oxide wherein: (a) the amorphous oxide of the active layer is selected from the group consisting of an oxide containing In, Ga and Zn, an oxide containing In, Zn and Sn, an oxide containing In and Zn, an oxide containing In and Sn, and an oxide containing In; and wherein (b) the amorphous oxide has an electron carrier concentration of 10 12 /cm 3 or more and less than 10 18 /cm 3 , and wherein a current between drain and source terminals of the field effect transistor when no gate voltage is applied is less than 10 microamperes; and wherein (c) the amorphous oxide has an oxygen defect density decreased by treatment in an atmosphere containing oxygen at a predetermined pressure upon or after film formation thereof.