Patent ID: 8493547
Filing Date: 2013-07-23
Classification: G03F,Y10T

Abstract:
1. An exposure apparatus which sequentially exposes an energy beam on a plurality of divided areas placed in a shape of a matrix 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, the position measurement system obtaining positional information of the movable body based on measurement results of a predetermined number of heads, each of the predetermined number of heads irradiating a measurement beam on a measurement plane, receiving a return beam from the measurement plane, and measuring a position of the movable body in each measurement direction, the measurement plane having a substantially rectangular opening and being placed facing the movable body roughly in parallel to the predetermined plane; and a control system which drives the movable body based on the positional information obtained by the position measurement system, and also switches at least one of the predetermined number of heads used to compute the positional information of the movable body to a different head, according to a position of the movable body, wherein of the plurality of heads, a separation distance of two heads set apart in a first direction within the predetermined plane is larger than a width of the opening in the first direction.