Patent ID: 7378764

Claim:
A positioning apparatus, configured for moving a movable member relative to base member by a surface motor, comprising: a first coil unit including plurality of coils which are arranged in an X-axial direction and which have a longer length in a Y-axial direction than in the X-axial direction, wherein an X-axis is perpendicular to a Y-axis; a second coil unit including a plurality of coils which are arranged in the Y-axial direction and which have a longer length in the X-axial direction than in the Y-direction; a first magnet unit configured to generate a force to the movable member in the X-axial direction in cooperation with the first coil unit and to generate a force to the movable member in the Y-axial direction in cooperation with the second coil unit; and a second magnet unit configured to generate a force to the movable member in a rotational direction around a Z-axis in cooperation with either the first coil unit or the second coil unit, wherein the Z-axis is perpendicular to both of the X-axis and the Y-axis.