Display apparatus

A display apparatus comprising:

• a substrate;
• a buffer layer on the substrate;
• a first thin film transistor facing the substrate with the buffer layer therebetween, the first thin film transistor comprising:
• a first semiconductor layer comprising an oxide semiconductor material, a first channel region, a first source region and a first drain region, and
• a first gate electrode facing the buffer layer with the first semiconductor layer therebetween;
• a conductive pattern which is facing the first semiconductor layer with the buffer layer therebetween and connected to the first semiconductor layer;
• a first contact hole in the buffer layer and exposing the conductive pattern to outside the buffer layer;
• and
• a display element which is electrically connected to the first thin film transistor and emits light,
• wherein the first source region or the first drain region of the first semiconductor layer extends through the first contact hole in the buffer layer, to contact the conductive pattern and connect the first semiconductor layer to the conductive pattern.