Patent ID: 7226836

Claim:
A method of manufacturing a substrate for an electro-optical device provided with a capacitor thereon, comprising: sequentially depositing, above the substrate, a lower conductive layer which is a lower electrode of the capacitor, an intermediate layer which is a dielectric film of the capacitor, and an upper conductive layer which is an upper electrode of the capacitor, the lower conductive layer being made of a material having an etching rate lower than an etching rate of a material of the upper conductive layer with respect to a predetermined etching agent; forming a mask having a predetermined planar pattern on the upper conductive layer; patterning the upper conductive layer, the intermediate layer, and the lower conductive layer by etching with the mask, a first etching agent being applied to at least the upper conductive layer and the lower conductive layer; and removing the mask, patterning including a collective etching of the upper conductive layer, the intermediate layer, and the lower conductive layer.