公开(公告)号：US06246544B1

公开(公告)日：2001-06-12

申请号：US09196737

申请日：1998-11-20

申请人： Katsumichi Tagami ,  Shinzo Tsuboi ,  Katsumi Suemitsu

发明人： Katsumichi Tagami ,  Shinzo Tsuboi ,  Katsumi Suemitsu

IPC分类号： G11B566

CPC分类号： G11B5/7315 ,  G11B5/59683 ,  G11B5/7325

摘要： A magnetic disk drive for recording and reproducing data out of a magnetic disk with a magnetoresisive (MR) head contacting the disk is disclosed. When the MR device is spaced from the surface of the medium by a recess of less than 15 nm inclusive, the surface of the medium is provided with a sheet resistance of less than 5 &OHgr;/cm2 inclusive. When the sheet resistance is greater than 5 &OHgr;/cm2, the recess is selected to be 16 nm or above. To enhance a frequency characteristic, the surface of the disk is provided with an undulation period of greater than 2 &mgr;m inclusive in the direction of movement of a head and a surface roughness of less than 1 nm inclusive. With this configuration, the disk drive obviates electrical faults ascribable to the sliding contact of the head and disk.

摘要翻译： 公开了一种磁盘驱动器，用于利用与磁盘接触的磁感应（MR）磁头从磁盘中记录和再现数据。 当MR器件通过具有小于15nm的凹槽与介质的表面间隔开时，介质的表面具有小于5欧姆/平方厘米（含）的薄层电阻。 当薄层电阻大于5欧姆/平方厘米时，凹槽选择为16纳米或以上。 为了提高频率特性，在头部的移动方向和小于1nm的表面粗糙度的范围内，盘的表面设置有大于2um的波动周期（包括端面）。 通过这种配置，磁盘驱动器消除由于磁头和磁盘的滑动接触引起的电气故障。