Patent ID: 6919153

Claim:
A dose monitor method comprising: illuminating a mask with illumination light, which is disposed in a projection exposure apparatus and in which a dose monitor pattern is formed including a plurality of blocks intermittently or continuously arranged in one direction each including a shield portion and transmission portion arranged in a constant width p incapable of being resolved in the projection exposure apparatus in the direction and having a monotonously changing dimension ratio of the shield portion to the transmission portion of the block in the direction; passing only a 0th-order diffracted light through a pupil surface of the projection exposure apparatus in diffracted lights of the dose monitor pattern; and transferring a 0th-order diffracted light image of the dose monitor pattern onto a substrate to measure dose, wherein during the illuminating, a center of gravity of the 0th-order diffracted light image passed through the dose monitor pattern on the pupil surface of the projection exposure apparatus is shifted from an optical axis of the projection exposure apparatus.