Patent ID: 7150819

Claim:
A method of manufacturing a thin film magnetic head having a lower magnetic pole, an upper magnetic pole, and a gap layer formed in-between the magnetic poles, comprising the steps of: forming on the gap layer a first magnetic layer containing Co, Ni and Fe by a sputtering method, and forming a second magnetic layer containing Co, Ni, Fe, and saccharine sodium on said first magnetic layer, which is as an underlayer, using an electroplating method as an upper magnetic pole layer, wherein said first magnetic layer is comprised of: 40 wt %≦Co≦70 wt %, 10 wt %≦Ni≦25 wt %, and 10 wt %≦Fe≦30 wt %, further wherein said second magnetic layer is comprised of: 40 wt %≦Co≦70 wt %, 10 wt %≦Ni≦25 wt %, and 10 wt %≦Fe≦30 wt % and saccharine sodium, said first magnetic layer mainly comprises a body-centered cubic system, further wherein said second magnetic layer has a peak intensity ratio of I(200)/I(111)≧0.5 and I(110)/I(111)≧1, said second magnetic layer has a constitutional ratio of the face-centered cubic system and the body-centered cubic system of: 53%≦body-centered cubic system≦80% and 20%≦face-centered cubic system≦47%, and said face-centered cubic system+body-centered cubic system=100%.