Patent ID: 9324880
Filing Date: 2016-04-26
CPC Classification: H01L,H05B

Claim Text:
1. A thin film transistor comprising: a gate electrode; a gate insulating film which contacts the gate electrode; an oxide semiconductor layer which includes a first region represented by In(a) Ga(b) Zn(c) O(d), wherein 0<a≦37/60, 3a/7−3/14≦b≦91a/74−17/40, b>0, 0<c≦3/5, a+b+c=1, and d>0, and wherein a, b, and c correspond to a cation composition and d corresponds to a molar ratio of oxygen to cation composition to form oxide formed from zinc oxide, gallium oxie and zinc oxide, and a second region represented by In(p) Ga(q) Zn(r) O(s), wherein q/(p+q)>0.250, p>0, q>0, r>0, and s>0, and located farther than the first region with respect to the gate electrode, and which is arranged facing the gate electrode with the gate insulating film provided therebetween; and, a source electrode and a drain electrode which are arranged so as to be apart from each other and are capable of being electrically conducted through the oxide semiconductor layer.