Patent ID: 9401432
Filing Date: 2016-07-26
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising: a first insulator; a semiconductor over the first insulator, the semiconductor comprising a first region and a second region; a second insulator over the semiconductor; a first conductor over the second insulator, the first conductor comprising a first region overlapping the first region of the semiconductor and a second region not overlapping the first region of the semiconductor; and a second conductor comprising a region in contact with the second region of the semiconductor, wherein the first insulator comprises a protrusion region, wherein the semiconductor comprises a first layer over the protrusion region of the first insulator and a second layer over the first layer, wherein an electron affinity of the first layer is different from an electron affinity of the second layer, wherein a bottom surface of the second region of the first conductor is lower than a bottom surface of the second layer of the semiconductor, wherein a first side surface and a second side surface of the first region of the semiconductor face the first conductor, and wherein the first region of the first conductor and the region of the second conductor do not overlap each other.