Patent ID: 8339559

Claim:
A liquid crystal display unit structure formed on a substrate, comprising: a patterned first conductive layer, including a first data line segment and a gate line, formed on the substrate; a dielectric layer, covering the first data line segment and the gate line, the dielectric layer having at least two first openings exposing two terminals of the first data line segment; a patterned first semiconductor layer, formed on the dielectric layer, the patterned first semiconductor layer including at least a portion located above the gate line; a patterned etch stop layer, having a first portion and a second portion, the first portion of the patterned etch stop layer being located above the first data line segment, the second portion of the patterned etch stop layer being located on the patterned first semiconductor layer above the gate line; a patterned second conductive layer, including a source electrode, a drain electrode, a second data line segment and a common electrode line, 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 patterned etch stop 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 and the patterned first semiconductor layer, and the source electrode and the drain electrode are electrically connected to the patterned first semiconductor layer; a patterned passivation layer, covering the source electrode, the drain electrode, the second data line segment and the common electrode line; and a patterned transparent conductive layer, formed on the patterned passivation layer and electrically connected to the drain electrode.