Patent ID: 6992407

Claim:
A precise processing stage apparatus, comprising: a movable table installed in a main body part for supporting a work piece; a table holding mechanism installed in the main body part for allowing a movement of the movable table in arbitrary directions within a same plane; an electromagnetic driving means installed in the main body part for supplying a feed to the movable table within the same plane; and an electromagnetic braking mechanism for generating a braking force to stop the movable table at an arbitrary position on the same plane, wherein: the electromagnetic driving means comprises, as a pair, a plurality of driven magnets and a driving coil for generating a magnetic force working on a magnetic force of the driven magnets according to an energizing direction so as to supply a feed to the movable table through a mutual magnetic effect between the driven magnets and the driving coil; either the driven magnet or the driving coil is fixed at a prescribed position while the other is disposed to be integrally movable with the movable table; the electromagnetic braking mechanism includes braking magnets which face with each other and relatively move by synchronizing with the movement of the movable table and a nonmagnetic/conductive braking plate; and either the braking magnet or the braking plate is fixed at a prescribed position and the other is disposed to be movable by synchronizing with the movement of the movable table, and a pair of the braking magnets and the braking plate is for generating a braking force by a mutual magnetic effect between a magnetic force by an eddy current generated in the braking plate in accordance with the movement of the movable table and a magnetic force of the braking magnets.