Organic light emitting diode display device and manufacturing method thereof

A manufacturing method of an organic light emitting diode display, comprising:

• forming a semiconductor layer on a substrate;
• forming a doping mask on the semiconductor layer and doping the semiconductor layer;
• removing the doping mask;
• forming a first insulation layer covering the semiconductor layer;
• forming a first conductor on the first insulation layer;
• doping the semiconductor layer by using the first conductor as a mask;
• forming a second insulation layer covering the first conductor;
• forming a second conductor on the second insulation layer;
• forming a third insulation layer covering the second conductor;
• forming a third conductor on the third insulation layer;
• forming a passivation layer covering the third conductor;
• and
• forming a pixel electrode on the passivation layer.