Patent ID: 7267757
Filing Date: 2007-09-11
Classification: G11B,Y10T

Abstract:
1. A method for producing a thin-film magnetic head, comprising: forming a magnetic core having magnetic layers; and forming a magnetic gap film facing said magnetic core; wherein a magnetic layer, of said magnetic layers, is formed by electroplating in a plating bath having pH value of 2 or less and containing saccharin sodium to produce a thickness of 3 μm or more for said magnetic layer; wherein said magnetic layer contains Co, Ni, and Fe, with 20 ≦Co ≦40 wt %, 0<Ni≦2 wt %, and 60≦Fe≦80 wt %, and has a saturation magnetic flux density of 23,000 gauss or more; and wherein said magnetic layer which is formed by electroplating is the nearest plated layer to said magnetic gap of said magnetic layers.