Patent ID: 8188467

Claim:
An amorphous oxide, wherein the amorphous oxide includes In, Zn, N and O, an atomic composition ratio of N to N and O (N/(N+O)) in the amorphous oxide is equal to or larger than 0.01 atomic percent and equal to or smaller than 3 atomic percent, an atomic composition ratio of N to a sum of In and Zn (N/(In +Zn)) in the amorphous oxide is equal to or larger than 0.01 atomic percent and equal to or smaller than 7 atomic percent, an atomic composition ratio of In to In and Zn (In/(In +Zn)) in the amorphous oxide is equal to or larger than 15 atomic percent and equal to or smaller than 75 atomic percent, and the amorphous oxide does not include Ga, or, in a case where the amorphous oxide includes Ga, the number of Ga atoms contained in the amorphous oxide is smaller than the number of N atoms.