Title :
Optimal track-width design of AMR/GMR heads for high-track-density disk drives
Author :
Tomiyama, Futoshi ; Ide, Hiroshi ; Hamaguchi, Takehiko ; Takano, Hisashi ; Yamaguchi, Takashi ; Kodama, Naoki
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
fDate :
7/1/1998 12:00:00 AM
Abstract :
The optimization of the write and read track-widths based on the new concept of a soft error rate (SER) contour map is proposed. In the calculation of the SER, the side fringe erase bands, microtrack MR sensitivity profile, and mechanical positioning accuracy are taken into account. From the SER map, nominal write and read track-widths can be optimized so that the process tolerance of the track-width can be maximized. Highly improved accurate positioning techniques for sub-micron track-width processing and suppression of the erase band are necessary for realizing areal densities over 10 Gb/in2
Keywords :
giant magnetoresistance; hard discs; magnetic anisotropy; magnetic heads; magnetoresistive devices; AMR; GMR; anisotropic magnetoresistance; areal densities; contour map; high-track-density disk drives; magnetic heads; mechanical positioning accuracy; microtrack MR sensitivity profile; process tolerance; side fringe erase bands; soft error rate; sub-micron track-width processing; track-width design; Bit error rate; Disk drives; Equations; Error analysis; Information retrieval; Laboratories; Mechanical engineering; Memory; Noise level; Signal to noise ratio;
Journal_Title :
Magnetics, IEEE Transactions on
