Display apparatus and method of manufacturing the same

A method of manufacturing a display apparatus, the method comprising:

• forming an amorphous silicon layer on a substrate of the display apparatus;
• forming a thin film transistor of the display apparatus on the substrate, comprising:
• selectively crystallizing portions of the amorphous silicon layer on the substrate, by irradiating the portions of the amorphous silicon layer with a laser beam, to form a preliminary semiconductor layer defining:
• a channel region of a semiconductor layer of the thin film transistor,
• a preliminary source region and a preliminary drain region which are disposed at opposing sides of the channel region, respectively, and
• an amorphous silicon layer region of the semiconductor layer of the thin film transistor, disposed between the channel region and at least one of the preliminary source region and the preliminary drain region;
• forming a source region and a drain region of the semiconductor layer of the thin film transistor at the opposing sides of the channel region, respectively, by doping the preliminary source region and the preliminary drain region of the preliminary semiconductor layer with impurity ions;
• and
• forming a source electrode and a drain electrode of the thin film transistor respectively connected to the source region and the drain region of the semiconductor layer of the thin film transistor,
• wherein the semiconductor layer of the thin film transistor includes each of the channel region, the source region, the drain region and the amorphous silicon layer region connecting the channel region to at least one of the source region and the drain region, and
• forming on the substrate, a display device of the display apparatus which emits light to display an image, the display device connected to the thin film transistor including each of the channel region, the source region, the drain region and the amorphous silicon layer region connecting the channel region to the least one of the source region and the drain region.