Patent ID: 8323517

Claim:
A method of forming a magnetic pole section of a perpendicular magnetic recording type thin-film magnetic head, the forming method comprising: a first step of forming on an under layer a resist pattern having an opening; a second step of forming a first nonmagnetic layer to cover at least an interior wall in the opening of said resist pattern so as to narrow the opening; a third step of forming a first magnetic layer to fill at least the opening in which said first nonmagnetic layer has been formed; a fourth step of forming a magnetic layer pattern in the opening by selectively removing said first nonmagnetic layer and said first magnetic layer until said resist pattern is exposed; a fifth step of removing said resist pattern and then applying a resist layer onto said first nonmagnetic layer and said magnetic layer pattern; a sixth step of developing or ashing partway to remove a part of the applied resist layer and baking the remaining resist layer to improve its etch resistance; a seventh step of removing said first nonmagnetic layer from at least a side surface of said magnetic layer pattern by etching while leaving the baked resist layer; an eighth step of removing all of the resist layer and then forming a second nonmagnetic layer on said magnetic layer pattern; and a ninth step of forming a second magnetic layer on the formed second nonmagnetic layer.