Patent ID: 9195146
Filing Date: 2015-11-24
Classification: G01B,G03F

Abstract:
1. An interference exposure apparatus, comprising: a light source for providing an exposure light beam; a light homogenizer-collimator for homogenizing and collimating the exposure light beam emanating from the light source; an interference unit including at least two gratings for converting the exposure light beam into at least two coherent light beams, the interference unit being movable in a vertical direction to make the at least two coherent light beams converge on a surface of a substrate to form an interference exposure pattern, the at least two gratings each having a period in correspondence with a period of a desired exposure pattern and being distributed in correspondence with a distribution characteristic of the desired exposure pattern; driving and supporting means for supporting the substrate and carrying the substrate to move with at least three degrees of freedom; and measuring and alignment means for measuring an angle between a coordinate system of the interference unit and a coordinate system of the driving and supporting means so as to adjust an exposure position of the driving and supporting means based on a measurement result of the measuring and alignment means before exposing the substrate.