Patent ID: 8199303

Claim:
A method of manufacturing a liquid crystal display unit structure, comprising the steps of: forming a first data line segment and a gate line on a substrate; forming a dielectric layer covering the first data line segment and the gate line; forming a first semiconductor layer covering the dielectric layer; forming a patterned etch stop layer having a first portion and a second portion simultaneously on the first semiconductor layer, the first portion of the patterned etch stop layer being located above the first data line segment and the second portion of the patterned etch stop layer being located above a portion of the gate line; forming a second semiconductor layer covering the first semiconductor layer and the patterned etch stop layer; patterning the second semiconductor layer, the first semiconductor layer and the dielectric layer to form a plurality of first openings in the dielectric layer for exposing two terminals of the first data line segment, and to form a patterned first semiconductor layer and a patterned second semiconductor layer having a first portion located above the first data line segment and a second portion located above the portion of the gate line; forming a source electrode, a drain electrode, a second data line segment and a common electrode line on the patterned second semiconductor layer, wherein the second data line segment is electrically connected to the first data line segment via the first openings and the common electrode line has a portion substantially covering the first portion of the second patterned semiconductor layer located above the first data line segment, and wherein the source electrode and the drain electrode are located on two sides of the second portion of the patterned etch stop layer; forming a patterned passivation layer covering the source electrode, the drain electrode, the second data line segment and the common electrode line; and forming a patterned transparent conductive layer on the patterned passivation layer and electrically connected to the drain electrode.