Patent ID: 8436349
Filing Date: 2013-05-07
Classification: H01L

Abstract:
1. A process for fabricating a thin-film transistor in which a gate electrode is to be formed on a substrate, the process comprising the steps of: forming the gate electrode on the substrate; forming a metal oxide layer in such a way as to cover the gate electrode said metal oxide layer comprising Zn and further comprising at least one of In, Ga, Al, Fe, Sn, Mg, Ca, Si, and Ge, having a resistivity of from 10 forming a source electrode and a drain electrode; carrying out heat treatment to the source electrode and the drain electrode at a temperature in the range from 150° C. to 250° C. by using any one of an ultraviolet lamp, a visible-light lamp, an infrared lamp, a near infrared lamp, and a far infrared lamp in a gas selected from the group consisting of N wherein after the heat treatment, the channel region is amorphous and has a resistivity of from 10 Ωcm or more to 10 wherein the heat treatment is subjected to the first part of the metal oxide layer, and wherein the heat treatment is not subjected to a second part of the metal oxide layer; and wherein the second part of the metal oxide layer is located outside the first part of the metal oxide layer.