Liquid crystal display device and fabricating method thereof and method of repairing pixel using the same

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

• forming a gate line and a gate electrode on a substrate;
• forming a gate insulating film on the substrate;
• forming a semiconductor layer on the gate insulating film;
• forming a data line and a common source electrode on the gate insulating film, and in addition, forming a pixel drain electrode and a repair drain electrode to oppose the common source electrode such that a main channel of a main thin film transistor and an auxiliary channel of an auxiliary thin film transistor reside in the semiconductor layer at the same time;
• forming a protective layer on the gate insulating film to cover the common source electrode, the pixel drain electrode and the repair drain electrode;
• and
• forming a pixel electrode on the protective film to overlap with the repair drain electrode and to be electrically in contact with the pixel drain electrode.

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

• forming a gate line and a gate electrode on a substrate;
• forming a gate insulating film on the substrate to cover the gate electrode and the gate line;
• forming a semiconductor layer, a common source electrode and a data line by depositing a semiconductor material and a metal layer on the gate insulating film and patterning them at the same time, and in addition, forming a pixel drain electrode and a repair drain electrode to oppose the common source electrode such that a main channel of a main thin film transistor and an auxiliary channel of an auxiliary thin film transistor reside in the semiconductor layer at the same time;
• forming a protective layer on the gate insulating film to cover the common source electrode, the pixel drain electrode and the repair drain electrode;
• and
• forming a pixel electrode on the protective film to overlap with the repair drain electrode and to be electrically in contact with the pixel drain electrode.

A repairing method of a liquid crystal display device, comprising the steps of:

• connecting a pixel drain electrode for driving to a pixel electrode of a first horizontal line, and in addition, providing a thin film transistor including a repair drain electrode that overlaps with a pixel electrode of a second horizontal line;
• sensing a bad pixel included in the horizontal lines;
• opening a part of a drain electrode for driving of the bad pixel;
• and
• connecting the repair drain electrode to the pixel electrode of the bad pixel such that the same color data as a normal pixel, is supplied to the pixel electrode of the bad pixel.