| US 7,486,485 B2 | ||
| Perpendicular hard disk drive resistive against external magnetic field | ||
| Takehiko Hamaguchi, Kanagawa (Japan); Yoshihisa Kamo, Tokyo (Japan); Hideaki Maeda, Kanagawa (Japan); Yukiya Shimizu, Kanagawa (Japan); Ikuya Tagawa, Kanagawa (Japan); and Tetsuo Yuki, Kanagawa (Japan) | ||
| Assigned to Hitachi Global Storage Technologies Netherlands B.V., AZ Amsterdam (Netherlands) | ||
| Filed on Oct. 28, 2005, as Appl. No. 11/262,531. | ||
| Claims priority of application No. 2004-313711 (JP), filed on Oct. 28, 2004. | ||
| Prior Publication US 2006/0092556 A1, May 04, 2006 | ||
| Int. Cl. G11B 5/127 (2006.01) | ||
| U.S. Cl. 360—317 | 20 Claims |
| 1. An apparatus for data storage system comprising:
a perpendicular recording medium having a soft under layer and recording layer;
a magnetic head having a main pole, an auxiliary pole, a pair of upper and lower read shields, and a magneto-resistive element
sandwiched between the pair of the upper and lower read shields; and
a case of housing the perpendicular recording medium and the magnetic head,
wherein the magnetic head further comprises a magnetic shield that shields a stray field applied in a direction perpendicular
to the surface of the perpendicular recording medium, and the case comprises a cover (including ferromagnetic material) made
of a constituent material having a magnetic field shielding effect.
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