Patent ID: 9019472
Filing Date: 2015-04-28
Classification: G03F,Y10T

Abstract:
1. An exposure apparatus which sequentially exposes an energy beam on a plurality of divided areas placed on an object, and forms a pattern on each of the plurality of divided areas, the apparatus comprising: a movable body which holds the object and moves along a predetermined plane; a position measurement system which has a plurality of heads provided on the movable body, and obtains positional information of the movable body based on measurement results of a predetermined number of heads of the plurality of heads, the predetermined number of heads irradiating a measurement beam on a measurement plane placed facing the movable body roughly in parallel to the predetermined plane and having a measurement non-effective area in part of the measurement plane, receiving a return beam from the measurement plane, and measuring a position of the movable body in each measurement direction; and a control system which drives the movable body, while switching a head to be used to compute the positional information of the movable body, based on the positional information obtained by the position measurement system, wherein of the plurality of heads, a separation distance of two heads set apart in a predetermined direction within the predetermined plane is decided, taking into consideration a size of the measurement non-effective area in the predetermined direction.