| US 7,573,675 B2 | ||
| Thin film magnetic head | ||
| Naoki Ohta, Tokyo (Japan); Kazuki Sato, Tokyo (Japan); Noriaki Kasahara, Tokyo (Japan); and Takeo Kagami, Tokyo (Japan) | ||
| Assigned to TDK Corporation, Tokyo (Japan) | ||
| Filed on Mar. 14, 2006, as Appl. No. 11/374,167. | ||
| Claims priority of application No. P2005-080256 (JP), filed on Mar. 18, 2005; and application No. P2006-000194 (JP), filed on Jan. 04, 2006. | ||
| Prior Publication US 2006/0209470 A1, Sep. 21, 2006 | ||
| Int. Cl. G11B 5/31 (2006.01) | ||
| U.S. Cl. 360—123 | 13 Claims |
| 1. A thin film magnetic head having a medium-facing surface, comprising:
a pair of magnetic shield layers facing each other, each magnetic shield layer having a first end face forming the medium-facing
surface and a second end face located opposite to the first end face;
a magnetoresistive effect element located between the pair of magnetic shield layers and located on the first end face side;
a bias-applying layer located between the pair of magnetic shield layers and arranged to apply a bias magnetic field to the
magnetoresistive effect element; and
a hard magnetic layer located between the pair of magnetic shield layers and located closer to the second end face side than
the magnetoresistive effect element,
wherein a length of the hard magnetic layer in a direction perpendicular to the first end face is larger than ⅓ and smaller
than ½ of a length of the magnetic shield layers in the direction perpendicular to the first end face.
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