公开(公告)号：JPH10241155A

公开(公告)日：1998-09-11

申请号：JP2465098

申请日：1998-02-05

Applicant: IBM

Inventor： THOMAS ROBERT ALBRECH ,  BAUMGART PETER MICHAEL ,  TAO AN GUEN ,  KIRT ALLEN RUBIN ,  TAM ANDREW C

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/016 ,  G11B5/09 ,  G11B5/65 ,  G11B5/73 ,  G11B5/738 ,  G11B5/82 ,  G11B5/84 ,  G11B11/10 ,  G11B13/00 ,  G11B20/10 ,  G11B27/11 ,  G11B27/24

Abstract: PROBLEM TO BE SOLVED: To utilize information such as manufacturer, batch number, date of manufacture, serial number, etc., for fault analysis by storing information as a series of non-magnetic marks written by the laser to a disk surface, using such information as the encoded identification information and then reading such ID information. SOLUTION: The CSS area 113 is formed in the spiral shape with many bumps to have a landing zone of 3mm width. To encode the magnetic disk information in the CSS area 113, the laser bump in the CSS area 113 is encoded. The identification information is encoded in the CSS area 113 by changing little the interval of the laser bumps. Since bump interval is used for encoding, the apparatus can be simplified. Influence on friction is minimized by keeping constant the bump density within the CSS area 113. Since many bumps are provided in the cover area of the slider 120, laser bump enables encoding of the identifier without giving bad influence on the performance of texturing of area.