Patent ID: 7348198

Claim:
A method of fabricating a liquid crystal display device, comprising: forming a first mask pattern group including a gate line, a gate electrode and a common line having a double-layer structure of a first transparent conductive layer and a second opaque conductive layer, and a common electrode having a single-layer structure of a first conductive layer of the common line on a substrate using a first mask; forming a gate insulating film on the first mask pattern group; forming a second mask pattern group including a semiconductor pattern and a source/drain pattern having a data line, a source electrode and a drain electrode overlapped on the gate insulating film using a second mask; forming a protective film on the second mask pattern group; and forming a pixel hole passing through the protective film, and forming a third mask pattern group including a pixel electrode making an interface with the protective film in the pixel hole to be connected to the drain electrode, thereby forming a horizontal electric field with the common electrode, using a third mask.