Patent ID: 9324877
Filing Date: 2016-04-26
CPC Classification: H01L

Claim Text:
1. A semiconductor device comprising a transistor, the transistor comprising: a first gate electrode over a substrate; a first gate insulating layer over the first gate electrode; an oxide semiconductor layer over the first gate insulating layer; a source electrode and a drain electrode over the oxide semiconductor layer; a second gate insulating layer over the source electrode and the drain electrode; a second gate electrode over the second gate insulating layer, wherein the oxide semiconductor layer is located between the first gate electrode and the second gate electrode, wherein the oxide semiconductor layer comprises a first side surface along a channel length direction, a second side surface opposed to the first side surface, a third side surface along a channel width direction, and a fourth side surface opposed to the third side surface, wherein the source electrode is in contact with the first, second, and third side surfaces of the oxide semiconductor layer, wherein the drain electrode is in contact with the first, second, and fourth side surfaces of the oxide semiconductor layer, and wherein the second gate electrode extends beyond the oxide semiconductor layer along the channel width direction.