TFT-LCD having dummy gate electrode and dummy gate insulator

A liquid crystal display including a first substrate having an active layer with source/drain regions formed therein, and a gate line and a data line formed thereon extending in directions perpendicular to each other, the liquid crystal display comprising:

• a dummy gate insulating film and a dummy gate electrode both formed on the first substrate in fixed patterns isolated from the gate line;
• an interlayer insulating film on the first substrate inclusive of the dummy gate electrode and exposing a part of the first substrate where the data line is formed;
• a drain electrode formed on the interlayer insulating film electrode so as to be in contact with the drain region, to have a step to the data line, and to overlap a portion of the dummy gate;
• a passivation film formed on the interlayer insulating film inclusive of the dummy gate electrode and the data line;
• a contact hole formed to expose the drain electrode overlapping the dummy gate electrode;
• and,
• a pixel electrode overlapping upper edges of the data line and in contact with the drain electrode through the contact hole.

A method for fabricating a liquid crystal display including a first substrate having an active layer with source/drain regions formed therein, and a gate line and a data line extending in directions perpendicular to each other formed thereon, the method comprising:

• (a) forming the gate line at a same time while forming a dummy gate insulating film and a dummy gate electrode both on the first substrate in fixed patterns isolated from the gate line;
• (b) forming an interlayer insulating film on the first substrate inclusive of the dummy gate electrode and the gate line so as to have a step;
• (c) forming the data line at a same time while forming a drain electrode on the interlayer insulating film so as to be in contact with the drain region, to have a step to the data line, and to overlap a portion of the dummy gate electrode;
• (d) forming a passivation film on the interlayer insulating film inclusive of the dummy gate electrode and the data line;
• (e) forming a contact hole to expose the drain electrode overlapping with the dummy gate electrode;
• and,
• (f) forming a pixel electrode on the passivation film to be overlapped on upper edges of the data line and in contact with the drain electrode through the contact hole.

A method for fabricating a liquid crystal display including a first substrate having an active layer with source/drain regions formed therein, and a gate line and a data line extending in directions perpendicular to each other formed thereon, the method comprising:

• (a) forming the gate line at a same time while forming a dummy gate insulating film and a dummy gate electrode both on the first substrate in fixed patterns isolated from the gate line;
• (b) forming an interlayer insulating film on the first substrate inclusive of the dummy gate electrode and the gate line to expose a portion of the first substrate where the data line is formed;
• (c) forming the data line on the exposed portion of the first substrate at a same time while forming a drain electrode on the interlayer insulating film so as to be in contact with the drain region, to have a step to the data line, and to overlap a portion of the dummy gate electrode;
• (d) forming a passivation film on the interlayer insulating film inclusive of the dummy gate electrode and the data line;
• (e) forming a contact hole to expose the drain electrode overlapping the dummy gate electrode;
• and,
• (f) forming a pixel electrode on the passivation film to be overlapped on upper edges of the data line and in contact with the drain electrode through the contact hole.