Patent ID: 7938979

Claim:
A method of fabricating mirrors for LCOS (Liquid Crystal On Silicon) display device, comprising: forming a dielectric layer over a silicon substrate; forming a stop layer over the dielectric layer; forming an insulation layer over the stop layer; etching the insulation layer and the stop layer until the dielectric layer is exposed, thus forming an insulation fence; forming a metal layer over the dielectric layer and the insulation fence; and immediately after forming the metal layer over the dielectric layer and the insulation fence, planarizing the metal layer and the insulation fence, thus the planarized insulation fence isolating the metal layer into mirror array; wherein the metal layer is formed after forming the insulation fence, whereby there is no chance of a contact and hence an electrochemical reaction of the metal layer with basic solution, and no pits are generated in the metal layer and no pits are generated in the mirror array formed subsequently.