Thin film transistor array panel and organic light emitting diode display including the same

A thin film transistor array panel comprising:

• a substrate;
• an oxide semiconductor disposed on the substrate;
• a first gate insulation layer disposed on the oxide semiconductor;
• a first layer disposed on the first gate insulation layer and including titanium;
• a second layer disposed on the oxide semiconductor and including titanium oxide;
• a first gate electrode disposed on the first layer;
• and
• a source electrode and a drain electrode connected to the oxide semiconductor.

An organic light emitting diode display comprising:

• a substrate;
• an oxide semiconductor disposed on the substrate;
• a first gate insulation layer disposed on the oxide semiconductor;
• a first layer disposed on the first gate insulation layer and including titanium;
• a second layer disposed on the oxide semiconductor and including titanium oxide;
• a first gate electrode disposed on the first layer;
• a source electrode and a drain electrode connected to the oxide semiconductor;
• a first electrode connected to the drain electrode;
• an organic emission layer disposed on the first electrode;
• and
• a second electrode disposed on the organic emission layer.