Patent ID: 7558445

Claim:
An electro-optical device comprising: a substrate; a data line and a scanning line that intersect with each other over the substrate; a pixel electrode that is provided at a position corresponding to an intersection of the data line and the scanning line; a semiconductor layer that includes: a channel region that has a channel length in an extending direction in which one of the data line and the scanning line extends; a data line side source/drain region that is electrically connected to the data line; a pixel electrode side source/drain region that is electrically connected to the pixel electrode; a first junction region located between the channel region and the data line side source/drain region; and a second junction region located between the channel region and the pixel electrode side source/drain region; a first insulating film having an island shape that covers the second junction region and that does not overlap the channel region in plan view; a gate electrode that includes: a body portion that overlaps the channel region via a gate insulating film; a first extended portion that extends from the body portion onto the first insulating film; and a second extended portion that extends from the first extended portion in a direction that intersects the extending direction to beside the semiconductor layer; and a second insulating film between the substrate and the semiconductor layer, the second insulating film having a groove that extends along at least the second junction region of the semiconductor layer beside the first insulating film as viewed in plan, wherein the first extended portion continuously covers a portion of the first insulating film that includes an upper face portion located directly above the second junction region and a side face portion located beside the second junction region, and the second extended portion overlaps the groove and has an inner groove portion that is formed inside the groove.