Patent ID: 6021024
Filing Date: 2000-02-01
Classification: G11B

Abstract:
A magnetic disk drive for carrying out writing/reading information to/from a magnetic disk having a plurality of tracks including an innermost circumference track and an outermost circumference track, comprising:rotary actuator;magnetic head slider;a magnetic head unit-mounted on said magnetic head slider and comprising a magnetic gap structure; anda rotary actuator arm having a first end pivotally connected at a fixed pivot point to said rotary actuator and a second end connected to said magnetic head slider; whereina length between said magnetic gap structure and said fixed pivot point is fixed and is set in a range of 1.1R.sub.0 to 1.2R.sub.0 where R.sub.0 is a distance between a center of rotation of said magnetic disk and the fixed pivot point;wherein:said magnetic head slider includes an inflow end and an outflow end for a fluid flow generated by a rotation of said magnetic disk and further includes at least one bearing generating dynamic pressure by said fluid flow, andsaid magnetic head unit is provided close to said outflow end; andwherein said bearing of said magnetic head slider includes:an air bearing surface in which a dynamic pressure is generated by fluid flow generated by the rotation of said magnetic disk;a non-bearing surface, provided on a rear side of said air bearing surface, with respect to a rotating direction of said magnetic disk, in which a dynamic pressure is little generated; anda pad portion, provided on a rear side of said non-air bearing surface, with respect to a rotating direction of said magnetic disk, in which said magnetic head unit is mounted.