Patent ID: 6767755
Filing Date: 2004-07-27
Classification: C30B,G02F,H01L

Abstract:
A method of producing an electrooptical device having a first substrate carrying a display section provided with pixel electrodes and a peripheral-driving-circuit section provided on a periphery of the display section, a second substrate, and an optical material disposed between the first substrate and the second substrate; the method comprising the steps of:a gate-forming step for forming a gate portion including a gate electrode and a gate insulating film on one face of said first substrate; a step-forming step for forming a step difference on said one face of the first substrate; a layer-forming step for forming a melt layer of a low-melting-point metal containing silicon on the first substrate having the gate portion and the step difference; a deposition step for depositing a single-crystal silicon layer by allowing the silicon of said melt layer to grow by graphoepitaxy by a cooling treatment using as a seed the step difference on the first substrate; a step for effecting a predetermined treatment on said single-crystal silicon layer, thereby forming a channel region, a source region and a drain region; and a step for forming a first thin-film transistor of dual-gate type having the gate portion above and below said channel region and constituting at least part of said peripheral-driving-circuit section.