Patent ID: 6555843
Filing Date: 2003-04-29
Classification: H01L

Abstract:
A semiconductor device comprising:a substrate having an insulating surface; a plurality of pixel electrodes arranged in a matrix form over said substrate; a plurality of thin film transistors formed over said substrate, each of said thin film transistors comprising a semiconductor layer comprising crystalline silicon and including source, drain and channel regions therein and a gate electrode located over the channel region with a gate insulating film interposed therebetween; a plurality of first signal lines extending in a first direction over said substrate and including the gate electrodes of said thin film transistors, wherein said first signal lines and said gate electrodes comprise a metal; a plurality of second signal lines extending across and over said first signal lines, wherein side surfaces of said first signal lines and said gate electrodes are covered by an oxide film comprising an oxide of said metal and a top surface of said first signal lines and said gate electrodes is covered with an insulating film comprising silicon oxide.