Patent ID: 7129025
Filing Date: 2006-10-31
Classification: B81C,G03F,H01L,Y10S

Abstract:
1. A method of fabricating a three-dimensional microstructure, comprising: forming a first thick photoresist layer on a substrate; applying a first exposure by a first mask to said first thick photoresist layer so that exposed areas and unexposed areas are formed; applying a second exposure by a second mask to said unexposed areas of said first thick photoresist layer and adjusting an exposure dosage so that an exposure depth on said unexposed areas is formed, said exposure depth representing a thickness of a top wall of the microstructure, said exposure depth being less than a thickness of said first thick photoresist layer; and releasing said unexposed areas to form at least a microchannel between said top wall and said substrate in said first thick photoresist layer.