Patent ID: 7193822
Filing Date: 2007-03-20
Classification: B82Y,G11B

Abstract:
1. A thin film magnetic head comprising a magneto-resistive effect element having a magneto-resistive effect film, wherein said magneto-resistive effect film is a multilayer film comprising a nonmagnetic layer, a ferromagnetic layer formed on one surface of said nonmagnetic layer, a soft magnetic layer formed on the other surface of said nonmagnetic layer, and a pinning layer formed so as to contact with one surface of said ferromagnetic layer for pinning a magnetization direction of said ferromagnetic layer, said one surface of said ferromagnetic layer opposite to the surface thereof contacting with said nonmagnetic layer, wherein, at both end portions of at least said soft magnetic layer of said magneto-resistive effect film, a pair of bias magnetic field applying layers are disposed for applying a longitudinal bias magnetic field to said soft magnetic layer via magnetic underlayers, and wherein mutual lattice point-to-point distances in a plane where each of said magnetic underlayers and the corresponding bias magnetic field applying layer are mated, are substantially equal to each other within an allowable error range of ±0.5%.