Patent ID: 7157722
Filing Date: 2007-01-02
Classification: G03F,G05B,Y10T

Abstract:
1. A positioning device comprising: an object movable at least in X and Y directions; object position measuring means for measuring positions of the object; a first structure guiding the object in the Y direction and movable in the X direction; a second structure guiding the object in the X direction and movable in the Y direction; first position measuring means for measuring the relative position of the first structure; second position measuring means for measuring the relative position of the second structure; first reference position judging means for judging whether the first structure has arrived at a first reference position; second reference position judging means for judging whether the second structure has arrived at a second reference position; and a rotation regulation portion for regulating at least one of the first and second structures; at least two pairs of electromagnet units provided on the object in such a manner as to embrace side faces of the first structure and the second structure, wherein at least one of the first and second structures has a rotation regulating portion for regulating its rotation.