Patent ID: 8059350
Filing Date: 2011-11-15
Classification: G11B

Abstract:
1. A patterned-media perpendicular magnetic recording disk comprising: a disk substrate; a plurality of concentric generally circular data tracks on the substrate and patterned into discrete data islands of magnetizable material, the data islands having a bit pitch (BP) in the along-the-track direction and the tracks having a track pitch (TP) in the cross-track direction; and a plurality of angularly spaced servo sectors on the substrate and extending generally radially across a plurality of the data tracks, each servo sector comprising first and second circumferentially-adjacent fields of magnetized servo stripes slanted at an acute angle relative to the data tracks, the magnetized servo stripes having a stripe pitch in the cross-stripe direction substantially equal to TP, each of the magnetized servo stripes comprising magnetized segments oriented generally perpendicular to the along-the-track direction and separated by nonmagnetic spaces in the along-the-track direction, the magnetized segments in the servo stripes having a segment pitch in the along-the-track direction substantially equal to BP.