Patent ID: 7959141
Filing Date: 2011-06-14
Classification: G03B,H02K

Abstract:
1. A stage apparatus comprising: a base that has a top surface and a side surface extending along a Y-axis direction as gliding surfaces wherein the side surface is arranged on the extreme outer edge of the top surface as seen from above; a Y-axis drive part having a first Y-axis shaft and a second Y-axis shaft which have magnets on the inside and extend along the Y-axis direction, and a first Y-axis mover and a second Y-axis mover, respectively constituted by coils that surround the Y-axis shafts; a Y-axis movable body, which has a main body part that is connected to the first Y-axis mover and the second Y-axis mover on the top surface of the base, and a lateral part that is connected to the first Y-axis mover and faces the side of the base, and which moves in the Y-axis direction along the top surface of the base and the side of the base; an X-axis movable body that moves along the main body part in an X-axis direction, which is a horizontal direction that is orthogonal to the Y-axis direction; and attraction force generating means for generating a force to cause mutual attraction between the side of the base and the lateral part of the Y-axis movable body, the attraction force generating means being provided therebetween, wherein the first Y-axis shaft is arranged on the outer side of the base from the side surface as seen from above, wherein the lateral part is disposed downwardly of the Y-axis mover.