Patent ID: 6160600
Filing Date: 2000-12-12
Classification: G02F

Abstract:
A reflective type liquid crystal display device comprising:a first insulating substrate having transparency;a reflecting layer;a second insulating substrate disposed opposite to the first insulating substrate, and at least a part of said second insulating substrate covering the reflecting layer;a liquid crystal material interposed between the first and second substrates;a first electrode formed over the first insulating substrate;a first conducting line for applying electrical signals to the first electrode, said first conducting line being formed over the first insulating substrate;a first thin film transistor formed over the first insulating substrate as a switching element and electrically connected to the first electrode and the first conducting line,said first thin film transistor comprising:a crystalline semiconductor island formed over the first insulating substrate;source and drain regions formed in the crystalline semiconductor island;a gate electrode formed adjacent to the crystalline semiconductor island having a gate insulating film therebetween,a pair of low concentration regions each being adjacent to the source and drain regions in the crystalline semiconductor island;an interlayer insulating film covering the first thin film transistor, said interlayer insulating film being a multilayer film of silicon oxide and silicon nitride;a second electrode formed over the first insulating substrate and electrically insulated from the first electrode and from the first conducting line; anda second conducting line for applying electrical signals to the second electrode, said second conducting line being formed on the first insulating substrate,wherein the liquid crystal material is operated by a parallel electric field to the first substrate, said parallel electric field being generated between the first and second electrodes,wherein the liquid crystal material is oriented in a hybrid alignment nematic mode.