Patent ID: 8247818

Claim:
An electro-optical device comprising: a data line; a scanning line; a pixel electrode disposed so as to correspond to an intersection of the data line and the scanning line; an insulating film disposed between the data line and the scanning line, the insulation film having an open hole portion holed so as to overlap with the intersection of the data line and the scanning line; and a transistor controlling signal supply to the pixel electrode, the transistor including: a semiconductor layer being continuously formed from an inside of the open hole portion up to an outside of the open hole portion, the semiconductor layer including: a first source/drain area electrically connected to a surface portion of the data line exposed to a bottom surface of the open hole portion; a channel area disposed on a side wall of the open hole portion; and a second source/drain area formed outside the open hole portion and electrically connected to the pixel electrode; and a gate electrode formed inside the open hole portion so as to overlap with at least the channel area and electrically connected to the scanning line.