Exposure apparatus, device manufacturing method, pattern generator and maintenance method

摘要

An exposure apparatus for exposing a predetermined pattern onto an object via a projection optical system includes a pattern generating unit that includes plural pixels, and generates the predetermined pattern by driving the plural pixels, a measuring unit for measuring at least one of optical performance of the pattern generating unit and a driving state of the plural pixels, and a maintenance unit for maintaining the pattern generating unit based on a measuring result by the measuring unit.