Patent ID: 7358102

Claim:
A method of forming a microelectromechanical optical (MEMO) display device, comprising: forming an optical stack layer on a substrate; forming a sacrificial layer on the optical stack layer; patterning the sacrificial layer to form a plurality of holes therein; filling a supporting material in the holes to form a plurality of posts; forming a reflective layer on the sacrificial layer and the posts; forming a flexible layer on the reflective layer; forming a photoresist layer on a portion of the flexible layer; performing a wet etching using the photoresist layer as a mask to remove a portion of the flexible layer to form a patterned flexible layer, wherein the wet etching is stopped on the reflective layer; removing the photoresist layer; performing a dry etching using the patterned flexible layer as a mask to remove a portion of the reflective layer to form a patterned reflective layer, wherein a mechanical layer is formed with the patterned flexible layer and the patterned reflective layer; and removing the sacrificial layer and thus the mechanical layer is supported by the posts.