Patent ID: 9111803
Filing Date: 2015-08-18
Classification: H01L

Abstract:
1. A thin-film device, comprising: a substrate; and a first device and a second device which are located above the substrate, the first device including: a first gate electrode formed above the substrate; a first gate insulating film covering the first gate electrode; and a first thin film located opposite to the first gate electrode with the first gate insulating film in between, and the second device including: a second gate electrode located at a position different from a position where the first gate electrode is formed; a second gate insulating film covering the second gate electrode; and a second thin film located opposite to the second gate electrode with the second gate insulating film in between, wherein the first thin film includes a strip-shaped first area and a strip-shaped second area located on each widthwise side of the strip-shaped first area, the strip-shaped second area including crystal grains having an average grain size smaller than an average grain size of crystal grains included in the strip-shaped first area, the first device has a channel which is a part including a plurality of the strip-shaped first areas and a plurality of the strip-shaped second areas formed to appear alternately, the second thin film includes a third area including crystal grains having an average grain size smaller than the average grain size in the strip-shaped first area, the second device has a channel which is the third area, and the strip-shaped first area includes crystal grains which are in contact with the strip-shaped second area on the each side of the strip-shaped first area.