Patent ID: 7978310

Claim:
A method of exposing an image of a first pattern, the method comprising: emitting a light onto the image of the first pattern set in a first plane that is above a photosensitive substrate set at a second plane; guiding the light, which passes through the first pattern and an optical surface, to form a second pattern in a surface of the photosensitive substrate; imaging an image of the second pattern through a liquid; and shielding a flare light generated in the optical surface at a position where an optical member contacts the liquid, wherein a condition of 0.25<D/Ym×tan Θ<1.7 is satisfied, where D is a space from the second plane to a position at which a shielding of the flare light start, Θ is a maximum incident angle of an image forming beam which reaches the second plane, and Ym is a maximum image height on the second plane.