Patent ID: 7598524

Claim:
A thin film transistor, comprising: a substrate; a gate electrode formed on said substrate, said gate electrode being made of silver; a first adhesion layer formed to be disposed between said substrate and said gate electrode, wherein said first adhesion layer consists of a material selected from the group consisting of: tantalum (Ta), nickel (Ni), tungsten (W), cobalt (Co), magnesium (Mg), vanadium (V), tungsten nitride, tantalum nitride, tantalum silicide, tungsten silicide, titanium alloy, and combinations thereof; a gate insulating layer formed on said gate electrode; a second adhesion layer separately formed with respect to said first adhesion layer, and disposed between said gate electrode and said gate insulating layer; a semiconductor layer formed on said gate insulating layer; and a source electrode and a drain electrode formed on parts of said semiconductor layer.