Liquid crystal display device and method for fabricating the same

A method for fabricating a liquid crystal display device, comprising steps of:

• forming a gate line by depositing a first metal layer on a substrate and patterning the first metal layer using a first mask;
• depositing an insulating layer, a pure amorphous silicon layer, a doped amorphous silicon layer and a second metal layer sequentially on the entire surface of the substrate and covering the gate line;
• forming an active area using a second mask by selectively patterning the second metal layer and the pure amorphous silicon layer, the second metal layer covering the entire surface of the substrate except for the active area;
• depositing a protection layer on the entire surface of the substrate and covering the data line region, the gate line protection layer and the active area;
• forming a data line, a protection film, a gate insulating layer, and source and drain electrodes by patterning the second metal layer, the pure amorphous metal layer, the doped amorphous silicon layer and the insulating layer using a third mask;
• depositing a transparent conductive material on the entire surface while covering the data line and the source and drain electrodes;
• and
• forming a pixel electrode and exposing a portion of the gate line using a fourth mask, the pixel electrode being connected with the drain electrode, the exposed portion extending from the active area.

A method for fabricating a liquid crystal display device, comprising steps of:

• forming a gate line by depositing a first metal layer on a substrate and patterning the first metal layer using a first mask;
• depositing an insulating layer, a pure amorphous silicon layer, a doped amorphous silicon layer and a second metal layer sequentially on the entire surface of the substrate and covering the gate line;
• forming an active area and a data line region using a second mask by selectively patterning the second metal layer and the pure amorphous silicon layer, the second metal layer away from the data line region and covering the entire surface of the substrate excluding the active area and the data line;
• depositing a protection layer on the entire surface of the substrate while covering the data line region, the gate line protection layer and the active area;
• forming a data line, a protection film, a gate insulating layer, and source and drain electrodes using a third mask by patterning the second metal layer, the pure amorphous metal layer, the doped amorphous silicon layer and the insulating layer;
• depositing a transparent conductive material on the entire surface including the data line and the source and drain electrodes;
• and
• forming a pixel electrode and exposing a portion of the gate line using a fourth mask, the pixel electrode being connected with the drain electrode, the exposed portion extending from the active area.

A liquid crystal display (LCD) device, comprising:

• a plurality of gate lines extending in one direction on a transparent substrate;
• a plurality of data lines extending in a perpendicular direction to said gate lines such that active regions are defined at crossover points between said plurality of gate and data lines;
• a plurality of gate electrodes formed on said plurality of gate lines near said active regions;
• a plurality of source electrodes formed over said plurality of data lines near said active regions;
• a plurality of drain electrodes formed over said plurality of gate lines near said active regions;
• a protection layer formed on said plurality of drain electrodes;
• and
• a plurality of pixel electrodes formed on said protection layer within regions defined between adjacent gate and data lines, each pixel electrode overlapping at least a portion of a gate line adjacent to said pixel electrode such that said pixel electrode and said portion of gate line electrode form plates of a storage capacitor without an intervening conductor therebetween, and wherein a contact hole is defined over a portion of said pixel electrode such that said pixel electrode fills in sides of said contact hole and said drain electrode contacts said pixel electrode through said sides of said contact hole with said protection layer formed between said pixel electrode and said drain electrode.