| US 7,508,624 B1 | ||
| Transducers for perpendicular recording with write pole tip angled toward media | ||
| Mark A. Lauer, 3618 Trenery Dr., Pleasanton, Calif. 94588 (US) | ||
| Filed on Jul. 29, 2004, as Appl. No. 10/902,673. | ||
| Claims priority of provisional application 60/491708, filed on Aug. 01, 2003. | ||
| Int. Cl. G11B 5/127 (2006.01); G11B 5/31 (2006.01) | ||
| U.S. Cl. 360—122 [360/125.15] | 21 Claims |
| 1. A transducer for recording information on a perpendicular recording medium, the transducer comprising:
a body having a leading end, a trailing end, and a medium-facing surface;
a first soft magnetic layer disposed in the body and terminating at a first pole tip disposed adjacent to the medium-facing
surface;
a second soft magnetic layer that is magnetically coupled to the first soft magnetic layer in a part of the body distal to
the medium-facing surface, the second soft magnetic layer terminating at a second pole tip disposed adjacent to the medium-facing
surface, the second pole tip having a leading edge and a trailing edge, such that the leading edge is closer than the trailing
edge to the leading end, and the trailing edge protrudes toward the medium, compared to the leading edge; and
a physically hard layer that adjoins the trailing edge, has a Vickers hardness greater than that of alumina, and does not
coat the medium-facing surface.
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