Patent ID: 6097473
Filing Date: 2000-08-01
Classification: B82Y,G03F

Abstract:
A position detecting apparatus which detects the position of a pattern for alignment formed on a substrate comprising:a stage adapted to hold the substrate and two-dimensionally movable in a predetermined plane;a sensor having a probe which moves along a direction perpendicular to said predetermined plane in response to the position of a surface of said substrate in said direction and outputs a signal which varies in response to said movement of said probe;a position detecting device arranged nearby said stage, and which detects the position of said stage in said plane; anda measuring system which is electrically connected to said sensor and said position detecting device and which obtains the position of said pattern for alignment in said plane on the basis of signals which are output from said sensor and said position detecting device, respectively, when said pattern for alignment is moved relative to said probe.