Patent ID: 9720333
Date: 2017-08-01
CPC Classifications: G03F

Claim:
1. A scan-type exposure apparatus for transferring a pattern of a mask to a substrate via a projection optical system while scanning the mask and the substrate in a scanning direction, comprising: an aperture stop provided with at least one of a mask stage that holds the mask and is movable and a substrate stage that holds the substrate and is movable and configured to reduce an influence of flare light that enters from the projection optical system to the substrate, wherein an opening of the aperture stop includes a first opening portion corresponding to one shot region on the substrate, and a serrated second opening portion including a plurality of first openings that protrude in a second direction parallel to the scanning direction from a side of the first opening portion along a first direction perpendicular to the scanning direction, and a length of each of the plurality of first openings in the first direction decreases outward in the second direction from the side of the first opening portion along the first direction.