Patent ID: 7510893

Claim:
A manufacturing method of a display device comprising: forming a transistor over a substrate having a size of 1000Ã—1200 mm 2 or larger, the transistor comprising a gate electrode, a gate insulating film, and a semiconductor layer that has a source region, a drain region, and a channel region; and forming a pixel electrode that is electrically connected to one of the source region and the drain region, wherein the gate electrode is formed by: selectively forming a pattern including a metal material by use of droplet emitting means; selectively forming a resist by use of droplet emitting means, over the pattern; etching the pattern by use of atmospheric plasma; and ashing the resist by use of atmospheric plasma processing means after etching the pattern, wherein the droplet emitting means comprises a droplet emitting head in which a plurality of droplet emitting holes are disposed in a line form, and wherein the atmospheric plasma processing means comprises plasma generating means under 5 Torr to 800 Torr.