Patent ID: 8294875

Claim:
An exposure apparatus comprising: a projection optical system configured to project a pattern of a mask onto a substrate; an illumination optical system configured to illuminate the mask; a stage configured to move the substrate; and a sensor unit arranged on the stage and configured to receive light having passed through the projection optical system, wherein the sensor unit includes: an aperture plate on which a plurality of aperture patterns are formed, and a photoelectric conversion device configured to photoelectrically convert light having passed through at least one of the plurality of aperture patterns, wherein the plurality of aperture patterns includes: a first aperture pattern configured to measure an aberration of the projection optical system; a second aperture pattern configured to measure: (1) an effective light source distribution, which is formed on the pupil plane of the illumination optical system, (2) a diffractive light distribution generated by the pattern of the mask and formed on a pupil plane on the projection optical system, (3) a pupil transmittance distribution of the projection optical system, or (4) a combination of two of (1), (2), and (3), and a third aperture pattern configured to measure (1), (2), (3), or (4), wherein the distribution(s) for which the third aperture pattern is configured to measure is/are different than the distribution(s) for which the second aperture pattern is configured to measure, and wherein the exposure apparatus further comprises a control unit configured to perform a calculation that calculates either or both of the distributions for which the second aperture pattern and the third aperture pattern are configured to measure, respectively, based on light having passed through the respective aperture pattern(s) that is photoelectrically converted by the photoelectric conversion device.