Patent ID: 6765270
Filing Date: 2004-07-20
Classification: G02F,H01L

Abstract:
A TFT array substrate for use in a liquid crystal display device, the TFT array substrate comprising:a gate line arranged in a transverse direction over a substrate; a metallic oxide layer surrounding the gate line; a data line arranged in a longitudinal direction perpendicular to the gate line over the substrate; a thin film transistor formed near the crossing of the gate and data lines, the thin film transistor comprising: a gate electrode over the substrate, the gate electrode being extended from the gate line and surrounded by the metallic oxide so that the metallic oxide adheres to all faces of the gate electrode; a gate insulation layer on the metallic oxide surrounding the gate electrode; an active layer and an ohmic contact layer formed on the gate insulation layer; a source electrode formed on the ohmic contact layer over the gate electrode and extended from the data line; and a drain electrode formed on the ohmic contact layer over the gate electrode and spaced apart from the source electrode; a protection layer formed over said thin film transistor, the protection layer having a drain contact hole that exposes a portion of the drain electrode; and a pixel electrode formed in a pixel region that is defined by the gate and data lines, the pixel electrode contacting the drain electrode through the drain contact hole.