| US 7,589,937 B2 | ||
| Thin film magnetic head with high Fe alloy plating film and manufacturing method thereof | ||
| Gen Oikawa, Odawara (Japan); Kazue Kudo, Odawara (Japan); Youji Maruyama, Iruma (Japan); Noriyuki Saiki, Odawara (Japan); and Hiromi Shiina, Jyuou (Japan) | ||
| Assigned to Hitachi Global Storage Technologies Japan, Ltd., Odawara (Japan) | ||
| Filed on Jul. 19, 2004, as Appl. No. 10/894,723. | ||
| Claims priority of application No. 2003-207420 (JP), filed on Aug. 13, 2003. | ||
| Prior Publication US 2005/0036236 A1, Feb. 17, 2005 | ||
| Int. Cl. G11B 5/127 (2006.01) | ||
| U.S. Cl. 360—125.03 [360/125.54] | 10 Claims |
| 1. A thin film magnetic head, comprising:
a lower magnetic pole having a magnetic core,
wherein at least a portion of the magnetic core of the lower magnetic pole is made of an Fe-Ni-Co series alloy plating film
with addition of a nonmagnetic metal Cr or at least one of Pd, Rh, Ru, Re, Mo and Ir, and
wherein a film composition of the Fe-Ni-Co series alloy plating film comprises about 84-92 wt % Fe, about 1 to 3 wt % Co,
and about 0.5 to 1.5 wt % nonmagnetic metal,
wherein the Fe-Ni-Co series alloy plating film has a heat treatment in the magnetic field after plating,
wherein an Hc of the film composition of the Fe-Ni-Co series alloy plating film is 1.5 Oe or less.
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