Patent ID: 8760619
Filing Date: 2014-06-24
Classification: G03F

Abstract:
1. An exposure apparatus comprising: an original stage including a first mark; a substrate stage including a second mark and a photoelectric conversion device configured to detect light having passed through the second mark; a projection optical system configured to project a pattern of an original held by the original stage onto a substrate held by the substrate stage; a measurement device configured to measure a position of one of the substrate stage and the original stage; and a controller configured to detect a positional relationship between the first mark and the second mark based on a signal output from the photoelectric conversion device and a measurement result output from the measurement device upon moving the one of the substrate stage and the original stage while causing light supplied from a pulsed light source to enter the photoelectric conversion device via the first mark, the projection optical system, and the second mark, wherein the controller samples, at a plurality of sampling timings in accordance with predetermined cycle, a measurement result output from the measurement device, corrects the sampled measurement results at the plurality of sampling timings based on time intervals between a plurality of light emission timings of the pulsed light source and the plurality of sampling timings to determine positions of the one of the substrate stage and the original stage at the plurality of light emission timings, and detects the positional relationship between the first mark and the second mark based on the determined positions.