Patent ID: 7682856

Claim:
A method of manufacturing an electro-optical device, comprising, above a substrate: forming a plurality of data lines and a plurality of scanning lines that intersect each other; forming resist films in predetermined regions of semiconductor layers that are formed above the substrate; doping impurities into the semiconductor layers using the resist films as masks so as to form impurity regions around the predetermined regions; after removing the resist films, forming conductive films to be first gate electrodes and second gate electrodes of transistors so as to cover the predetermined regions and regions of the impurity regions adjacent to the predetermined regions in a longitudinal direction of channels of the transistors, wherein the second gate electrodes are disposed on the first gate electrodes; doping the impurities into outside regions of the regions of the impurity regions adjacent to the predetermined regions while using the second gate electrodes as masks so as to form heavily doped regions and lightly doped regions whose impurity concentrations are different from each other in the semiconductor layers; after doping the impurities into outside regions of the regions of the impurity regions adjacent to the predetermined regions while using the second gate electrodes as masks, selectively removing portions of the conductive films from sides of the conductive films under the second gate electrodes so that the first gate electrodes do not overlap the lightly doped regions and the second gate electrodes at least partially overlap the lightly doped regions; and forming pixel electrodes so as to correspond to the intersections between the plurality of data lines and the plurality of scanning lines.