Patent ID: 6967710

Claim:
An exposure apparatus which exposes an object with an illumination beam through a mask, comprising: an illumination optical system provided on an optical path through which the illumination beam passes to illuminate the mask with the illumination beam in each of illumination modes in which the illumination beam has different intensity distributions from each other on a pupil plane of the illumination optical system and which include on-axis and off-axis illumination modes, one of the different intensity distributions in the off-axis illumination mode having an increased intensity portion apart from an optical axis of the illumination optical system relative to a portion of the one intensity distribution on the optical axis; and a shaping optical system provided on the optical path in the illumination optical system to shape each of the different intensity distributions, that includes first optical members on the optical axis of which at least one is movable in a direction along the optical axis to change the one intensity distribution in the off-axis illumination mode so that the increased intensity portion of the one intensity distribution is variable, and another one of the different intensity distributions in the on-axis illumination mode, respectively.