Patent ID: 7910926

Claim:
An electro-optical device comprising: a data line and a scanning line extending so as to intersect each other; a pixel electrode in a pixel at a position corresponding to an intersection of the data line and the scanning line; and a switching element including: a semiconductor layer including: a channel region with a channel length along a direction in which either the data line or 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 that is formed between the channel region and the data-line-side source/drain region; and a second junction region that is formed between the channel region and the pixel-electrode-side source/drain region; and a gate electrode provided opposite to the channel region, the gate electrode overlapping the pixel-electrode-side source/drain region and having a ring-shaped structure that surrounds an opening at a position overlapping the second junction region; wherein the second junction region of the semiconductor layer of the switching element is an LDD region and the pixel-electrode-side source/drain region of the semiconductor layer of the switching element is a heavily doped region.