Patent ID: 6664569
Filing Date: 2003-12-16
Classification: G02F,H01L

Abstract:
An array substrate for use in a liquid crystal display device, comprising:a gate line arranged in a horizontal direction on a substrate; a data line arranged in a vertical direction perpendicular to the gate line over the substrate; and a thin film transistor formed near a crossing of the gate and data lines, the thin film transistor comprising: a gate electrode that is a portion of the gate line near said crossing, wherein the gate electrode has an opening portion in its central portion; a first insulation layer on the gate electrode; a semiconductor layer formed on the first insulation layer and over the gate electrode; a drain electrode formed on the semiconductor layer and over the gate electrode, the drain electrode corresponding to the opening of the gate electrode; and a source electrode extended from the data line and formed in a same plane as the drain electrode, the source electrode surrounding the drain electrode and opening of the gate electrode along steps of the semiconductor layer.