Recording Field Analysis of a High Track Density SPT Head (2) : for various areal densities

Abstract

High track density perpendicular SPT head is investigated by using 3-D finite element analysis. By assuming the side shield cores, the stray field can be decreased greatly when the density of 200Gb/in^2 (100nm write track width) is assumed. It is noted that the value of (stray field at adjacent track) / (recording field on track) can be reduced greatly with the side yoke shields as noted in 1Tb/in^2 analysis. To compensate the decrease of write field, increasing the main pole thickness is the most effective.