Patent ID: 7705944
Filing Date: 2010-04-27
Classification: G02F

Abstract:
1. A method of fabricating a liquid crystal display device with a protective film patterned by a lift-off process, comprising: a first mask process of forming a first mask pattern group including a gate line, a gate electrode connected to the gate line and a common line substantially parallel to the gate line, wherein the first mask pattern group has a first conductive layer group structure having at least double conductive layers, and a common electrode connected to the common line on a substrate; a second mask process of forming a gate insulating film on the first mask pattern group and forming a semiconductor pattern on the gate insulating film; and a third mask process of forming a third mask pattern group including a data line, a source electrode connected to the data line and a drain electrode opposite the source electrode that have a second conductive layer group structure having at least double conductive layers, and a pixel electrode connected to the drain electrode on the gate insulating film provided with the semiconductor pattern, and a protective film interfacing with the third mask pattern group on the gate insulating film provided with the semiconductor pattern; wherein the third mask process further includes: forming the second conductive layer group on the gate insulating film provided with the semiconductor pattern; forming a photo-resist pattern by the photolithography; forming the third mask pattern group by patterning the second conductive layer group by an etching process using the photo-resist patterns; removing an ohmic contact layer of the semiconductor pattern exposed between the source electrode and the drain electrode; forming the protective film on the photo-resist patterns; and removing the photo-resist patterns having the protective film thereon.