Patent ID: 8860022
Filing Date: 2014-10-14
Classification: H01L

Abstract:
1. A transistor comprising: an oxide semiconductor film comprising at least one of indium, gallium, tin, hafnium, and zinc, wherein the oxide semiconductor film is configured to give a first photoluminescence spectrum having a first peak and a second photoluminescence spectrum having a second peak, wherein the first peak is located in a range of greater than or equal to 1.6 eV and less than or equal to 1.8 eV, wherein the second peak is located in a range of greater than or equal to 1.7 eV and less than or equal to 2.4 eV, and wherein a ratio of an area of the second photoluminescence spectrum to a sum of an area of the first photoluminescence spectrum and the area of the second photoluminescence spectrum is greater than or equal to 0.1 and less than 1.