Patent ID: 8064160
Filing Date: 2011-11-22
Classification: G11B

Abstract:
1. A magnetic head for perpendicular magnetic recording comprising: a medium facing surface that faces toward a recording medium; a coil that generates a magnetic field corresponding to data to be written on the recording medium; and a pole layer that has an end face located in the medium facing surface, allows a magnetic flux corresponding to the magnetic field generated by the coil to pass therethrough and generates a write magnetic field for writing the data on the recording medium by means of a perpendicular magnetic recording system, wherein: the pole layer includes: a track width defining portion having a first end located in the medium facing surface and a second end opposite to the first end; and a wide portion connected to the second end; the first end defines a track width; the track width defining portion has a width taken in a track width direction; the wide portion has a width taken in the track width direction that is greater than the width of the track width defining portion taken in the track width direction; the wide portion includes a flare portion having an end connected to the second end and having a width taken in track width direction that increases with increasing distance from the medium facing surface; the flare portion has two side surfaces located on opposite sides in the track width direction; and the coil is helically wound only around the track width defining portion and the flare portion of the pole layer, and has a portion located between the medium facing surface and the two side surfaces of the flare portion.