Patent ID: 9412765
Filing Date: 2016-08-09
CPC Classification: H01L

Claim Text:
1. A manufacturing method for a thin film transistor, comprising: forming a structure on a substrate, the structure including: a semiconductor layer provided on the substrate, the semiconductor layer being made of an oxide including indium, the semiconductor layer having a top face, a first side face and a second side face, the first side face and the second side face being non-parallel to the top face, the second side face being apart from the first side face in a first direction, the top face having a first region, a second region, and an other region; a gate electrode provided between the semiconductor layer and the substrate; a gate insulating film provided between the gate electrode and the semiconductor layer; a first insulating film covering the other region of the semiconductor layer; and a second insulating film covering and physically contacting at least a part of the first side face and at least a part of the second side face, the forming the structure including forming the first insulating film under a first condition of film forming with a first source gas including a first gas containing silicon and a second gas containing oxygen and including forming the second insulating film under a second condition of film forming with a second source gas including the first gas containing silicon and the second gas; forming a source electrode on the first region of the semiconductor layer; and forming a drain electrode on the second region of the semiconductor layer, the drain electrode being apart from the source electrode in a second direction perpendicular to the first direction and parallel to the top face, the part of the first side face and the part of the second side face of the semiconductor layer being disposed between the source electrode and the drain electrode, wherein the second condition includes at least one of: the first insulating film has a part provided between the semiconductor layer and the source electrode and a part provided between the semiconductor layer and the drain electrode, and the second insulating film has a part provided between the semiconductor layer and the source electrode and a part provided between the semiconductor layer and the drain electrode.