Patent ID: 7129702
Filing Date: 2006-10-31
Classification: G11B,Y10T

Abstract:
1. A head cartridge having an XY stage supported by a surface plate reference base, comprising: a movable frame movable on said reference base along one of an X axis and a Y axis, said movable frame having a rectangular space inside thereof; a first drive source provided in said reference base, for moving said movable frame; a rectangular movable base mounted within said rectangular space of said rectangular movable frame, said rectangular movable base being movable on said reference base along the other of the X and Y axes and stopped on said reference base; and a second drive source provided in said movable frame, for moving said movable base; a fine elevation mechanism for floating said movable base from said surface of said reference base when said movable base is moved and making said movable base in contact with said surface of said reference base when said movable base is stopped, wherein said reference base is formed of stone and a surface of said movable base, which is in contact with said reference base, is surface-plate finished. wherein said movable frame is rectangular in plan view, a first bearing means is provided on opposing two sides of said rectangular movable frame for supporting said movable base movably, a second bearing means is provided between the other opposing two sides of said movable frame and said reference base and said first and second drive sources are linear motors, respectively, and wherein said first bearing means has a fixed side member and a movable side member, said fixed side member of said first bearing means fixed onto a rear surface of said rectangular movable frame, said movable side member of said first bearing means fixed onto said movable base.