Patent ID: 8223464
Filing Date: 2012-07-17
Classification: G11B

Abstract:
1. A differential-type magnetic read head, comprising: a differential-type magneto-resistive-effect film formed on a substrate; and a pair of electrodes for applying current to the differential-type magneto-resistive-effect film in a direction perpendicular to a film plane of the film, wherein the differential-type magneto-resistive-effect film includes a first stacked film having: wherein the differential-type magneto-resistive-effect film includes a second stacked film formed on the first stacked film, the second stacked film having: wherein a side face in a track width direction of the differential-type magneto-resistive-effect film is shaped to have an inflection point at an intermediate position in a thickness direction of the differential-type magneto-resistive-effect film, wherein the inflection point is located between the first free layer and the second free laver, wherein the side face is shaped to be approximately vertical to the substrate in an upward direction of the substrate from the inflection point, and wherein the side face is shaped to be gradually increased in track width as approaching the substrate in a downward direction of the substrate from the inflection point.