Patent ID: 7662704

Claim:
A method of manufacturing an electro-optical device having a base insulating substrate, a plurality of pixel units provided in a display region on the base insulating substrate, first semiconductor elements driving the plurality of pixel units respectively in the display region, a peripheral region surrounding the display region, a driving circuit provided in the peripheral region on the base insulating substrate, and second semiconductor elements of the driving circuit driving the plurality of pixel units, the method comprising: forming a semiconductor layer on the base insulating substrate in at least a region where each of the second semiconductor elements is to be disposed, the semiconductor layer having a silicon-on-insulator structure including a first single crystal silicon layer; forming an amorphous silicon layer on the semiconductor layer and a region where each of the first semiconductor elements is to be disposed, wherein the amorphous silicon layer on the semiconductor layer and the region where each of the first semiconductor elements is to be disposed is on the base insulating substrate, and the amorphous silicon layer on the region where each of the first semiconductor elements is to be disposed is formed directly on the base insulating substrate; and heating the amorphous silicon layer so that the amorphous silicon layer on the semiconductor layer is converted into a second single crystal silicon layer by epitaxial growth and the amorphous silicon layer in the region where each of the first semiconductor elements is to be disposed is converted into a polysilicon layer.