Patent ID: 6600524
Filing Date: 2003-07-29
Classification: G02F

Abstract:
A liquid crystal display apparatus having a pair of substrates, one of which is transparent, and a liquid crystal layer sandwiched between the substrates, and further having, on one of the substrates, a plurality of scanning electrodes, a plurality of signal electrodes intersecting like a matrix with said plurality of scanning electrodes, a plurality of switching devices, each being provided at a position corresponding to a respective one of the intersecting points between said plurality of scanning electrodes and said plurality of signal electrodes, a plurality of pixel electrodes connected to said switching devices, and a plurality of common electrodes connected to said plurality of scanning electrodes, and formed so that an electric field can be produced between said pixel electrodes and the common electrodes,wherein said switching device comprises a thin film transistor having a gate insulating layer consisting of a laminated film of silicon nitride and silicon oxide, a semiconductor layer of amorphous silicon, a drain electrode and a source electrode, and a supplementary insulating layer, laminated in order on the gate electrode, and wherein the supplementary insulating layer has a portion consisting of a silicon oxide layer formed by oxidizing a surface of the amorphous silicon semiconductor layer.