Patent ID: 7639933
Filing Date: 2009-12-29
Classification: H02K,H04N

Abstract:
1. A stage apparatus comprising: a stationary support plate; a stage member provided on the stationary support plate so as to move on a reference plane parallel with the stationary support plate; a plurality of Y-direction magnetic flux generators secured to one of said stationary support plate and said stage member; and a plurality of Y-direction moving coils secured to the other of said stationary support plate and said stage member, said Y-direction moving coils receiving magnetic flux from said Y-direction magnetic flux generators so as to generate a driving force in a specific Y-direction parallel with said reference plane between said Y-direction magnetic flux generators and said Y-direction moving coils, a plurality of X-direction magnetic flux generators secured to one of said stationary support plate and said stage member; and a plurality of X-direction moving coils secured to the other of said stationary support plate and said stage member, said X-direction moving coils receiving magnetic flux from said X-direction magnetic flux generators so as to generate a driving force in said X-direction between said X-direction magnetic flux generators and said X-direction moving coils; wherein at least one of said Y-direction moving coils and at least one of said Y-direction magnetic flux generators at least partly overlap each other in an X-direction, which is parallel with said reference plane and perpendicular to said Y-direction, and do not overlap in said Y-direction, and wherein at least one of said X-direction moving coils and at least one of said X-direction magnetic flux generators at least partly overlap each other in said X-direction, and do not overlap in said Y-direction.