Patent ID: 8735891
Filing Date: 2014-05-27
Classification: G02F,H01L

Abstract:
1. A display substrate comprising: a base substrate comprising: a display area including a pixel area, and a pad area adjacent to a side of the display area; a signal line disposed on the base substrate; a thin film transistor connected to the signal line, and including a drain electrode; a first insulating layer disposed on the thin film transistor, and a first thru-hole defined in the first insulating layer and corresponding to a portion of the drain electrode; a second insulating layer disposed on the first insulating layer, and a second thru-hole defined in the second insulating layer and corresponding to the first thru-hole; a common electrode disposed on the second insulating layer in the pixel area; a third insulating layer disposed on the second insulating layer, and a third thru-hole defined in the third insulating layer, extending directly from the first thru-hole and corresponding to the second thru-hole; and a pixel electrode disposed on the third insulating layer in the pixel area and connected to the portion of the drain electrode, wherein a cross-sectional area of the third thru-hole is different from a cross-sectional area of the second thru-hole.