Patent ID: 8045139

Claim:
An exposure apparatus of a semiconductor device, comprising: an exposure light source; an asymmetric adjustment filter coupled to the exposure light source and having an asymmetrically adjusted intensity light output; a photomask coupled to the asymmetric adjustment filter and passing the asymmetrically adjusted intensity light output; a projection lens coupled to the photomask and projecting the photomask output; a wafer stage including a wafer mounting to mount and retain a wafer on which an image is formed by the light projected from the projection lens, and wherein the asymmetric adjustment filter has a brightness profile that causes brightness to gradually increase from a first position to a second position and brightness to gradually decrease from a third position to the first position and brightness to gradually decrease from a center of the asymmetric adjustment filter to the first position and brightness to gradually increase from the center of the asymmetric adjustment filter to the second position and the third position, wherein the direction of the first position to the second position and the direction of the third position to the first position are substantially perpendicular to each other.