Patent ID: 7463448
Filing Date: 2008-12-09
Classification: G11B

Abstract:
1. A thin-film magnetic head comprising a write element, wherein: said write element comprises a lower yoke film, a first insulating film, a lower pole film, a gap film, and an upper pole film; said first insulating film is made of an inorganic insulating material, is provided on the surface of said lower yoke film and has a trench portion at least at a part corresponding to a magnetic pole end portion, and the surface of said lower yoke film is exposed in the bottom of said trench portion; said lower pole film is provided on said surface of said lower yoke film in the bottom of said trench portion; said gap film is a conductive non-magnetic film and is provided on the surface of said lower pole film inside said trench portion; said upper pole film is provided on the surface of said gap film inside said trench portion; said trench portion has a non-magnetic film made of a non-magnetic material on the inner side faces of the trench portion; a magnetic pole end portion of said lower pole film and a magnetic pole end portion of said upper pole film have a track width reduced by said non-magnetic film; said non-magnetic film is an Al-CVC film using an atomic layer method; and said Al-CVD film is within a range of 5 to 50nm in thickness.