Thin film transistor and display device using the same and method for manufacturing the same

A display device, comprising:

• a substrate body;
• a semiconductor layer positioned on the substrate body and comprising a polycrystalline silicon film having a surface resistance from about 2000 ohm/sq to about 8000 ohm/sq;
• and
• a source electrode and a drain electrode each in contact with the semiconductor layer and comprising a metallic material having a resistance from about 350 to about 2000 ohm.

A method for manufacturing a display device, comprising:

• preparing a glass substrate;
• forming a substrate body comprising a plastic material on the glass substrate;
• forming a semiconductor layer comprising a polycrystalline silicon film on the substrate body;
• forming a source electrode and a drain electrode, each in contact with a semiconductor layer in an inactivated state;
• and
• separating the glass substrate from the substrate body.