Patent ID: 7719639
Filing Date: 2010-05-18
Classification: G02F

Abstract:
1. A transflective-type liquid crystal display device, comprising: a substrate having a plurality of gate and data lines crossing each other to define a plurality of pixel regions; a buffer layer on the substrate, the buffer layer including a plurality of first portions each having a first thickness and a plurality of second portions each having a second thickness less than the first thickness; a polysilicon layer on the buffer layer, the polysilicon layer including a plurality of first portions each disposed on one of the plurality of first portions of the buffer layer, one of the second portions including source and drain regions; a gate insulating layer on the first portions of the polysilicon layer and the first and second portions of the buffer layer; a gate electrode and the plurality of gate lines on the gate insulating layer; a first insulating interlayer on the gate electrode and the first and second portions of the buffer layer; first and second contact holes through the gate insulating layer and the first insulating interlayer exposing portions of the source and drain regions; source and drain electrodes in the first and second contact holes contacting the exposed portions of the source and drain regions, respectively; a passivation layer on the source and drain electrodes and the first and second portions of the buffer layer, the passivation layer including a third contact hole exposing a portion of the drain electrode; a transparent electrode on the passivation layer and contacting the exposed portion of the drain electrode in the third contact hole of the passivation layer; a second insulating interlayer on the transparent electrode, the passivation layer, and the first and second portions of the buffer layer, the second insulating interlayer having a fourth contact hole exposing a portion of the transparent electrode; and a reflecting electrode on the second insulating interlayer and the first and second portions of the buffer layer, the reflecting electrode contacting the exposed portion of the transparent electrode through the fourth contact holes of the second insulating interlayer.