Patent ID: 7135861
Filing Date: 2006-11-14
Classification: B82Y,G11B

Abstract:
1. A movable stage including a reference base having a surface plate, a movable base and a bearing means, comprising: a movable member of said bearing means fixed to said movable base, said movable base being movable along a predetermined axis through said movable member; a guide means for guiding said movable base along the predetermined axis, said guide means being provided on said reference base and having a fixed side member of said bearing means; a pressing means provided on said guide means or said reference base, for pressing said movable base toward said reference base to lock said movable base on said reference base by making said movable base in contact with a surface of said reference base; and a movable base floating mechanism for floating said movable base from said surface of said reference base against the pressing force of said pressing means.