Patent ID: 6670641
Filing Date: 2003-12-30
Classification: G02F,H01L

Abstract:
An active matrix type display device comprising:a glass substrate; scanning and signal lines formed on said glass substrate in a matrix form; switching thin film transistors formed in the vicinity of cross points of said scanning and signal lines; pixel electrodes connected to said switching thin film transistors; and driving thin film transistors formed at peripheral portions of said glass substrate to drive said switching thin film transistors; wherein at least one of said driving thin film transistors includes, a semiconductor layer having source and drain regions, a channel region provided between said source and drain regions, and a lightly doped impurity region formed between said channel region and at least one of said source and drain regions, a gate insulation layer formed on said semiconductor layer, a gate electrode formed on said gate insulation layer, a side wall provided around said gate electrode to form said lightly doped impurity region, and an intermediate layer provided between said lightly doped impurity region and said side wall, said intermediate layer being made of a metal material and connected to said gate electrode.