| US 7,394,620 B2 | ||
| Perpendicular magnetic recording head and magnetic disc apparatus | ||
| Tomoko Taguchi, Kunitachi (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Mar. 19, 2004, as Appl. No. 10/804,022. | ||
| Claims priority of application No. 2003-124116 (JP), filed on Apr. 28, 2003. | ||
| Prior Publication US 2004/0212923 A1, Oct. 28, 2004 | ||
| Int. Cl. G11B 5/127 (2006.01) | ||
| U.S. Cl. 360—125 | 6 Claims |
| 1. A perpendicular magnetic recording head, comprising:
a main pole configured to generate a recording magnetic field in a perpendicular direction;
an auxiliary pole connected to the main pole on a leading side to the main pole; and
a write shield detached and uncoupled to the main pole on a trailing side to the main pole, the write shield having a multilayered
structure in which a nonmagnetic layer is sandwiched between magnetic layers, and comprising a central portion and edge portions
along a track width direction and having such a shape that has a thickness that is larger in each of the edge portions than
that in the central portion.
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