Patent ID: 7781767
Filing Date: 2010-08-24
Classification: H01L

Abstract:
1. A thin film transistor substrate comprising: a semiconductor layer of a thin film transistor, a source electrode, a drain electrode, and a transparent conductive film, wherein the substrate has a structure in which the source and drain electrodes are directly connected to the semiconductor layer of the thin film transistor, a diffusion prevention layer exists at an interface between the source and drain electrodes and the semiconductor layer of the thin film transistor, wherein the diffusion prevention layer comprises silicide formed by reaction of Ni and Si, and the source and drain electrodes are an Al alloy thin film consisting of: 0.1 to 6.0 atomic percent Ni, 0.1 to 1.0 atomic percent La, 0.1 to 1.5 atomic percent Si, and Al.