Patent ID: 8482879
Filing Date: 2013-07-09
Classification: G11B

Abstract:
1. A magnetic head for perpendicular magnetic recording, comprising: a medium facing surface facing a recording medium; a coil producing a magnetic field corresponding to data to be written on the recording medium; a main pole having a first end face located in the medium facing surface, the main pole allowing a magnetic flux that corresponds to the magnetic field produced by the coil to pass, and producing a write magnetic field for writing the data on the recording medium by means of a perpendicular magnetic recording system; and a return path section made of a magnetic material and having a second end face located in the medium facing surface, the return path section being connected to the main pole so that a space through which part of the coil passes is defined by the main pole and the return path section, the return path section including a plurality of magnetic path portions that separate the magnetic flux into a plurality of fluxes and allow the fluxes to pass therethrough in parallel, the magnetic head further comprising a nonmagnetic layer separating the plurality of magnetic path portions from each other, wherein the coil includes a winding portion disposed around an assemblage of the plurality of magnetic path portions, and in any cross section that intersects all of the plurality of magnetic path portions, a distance between two adjacent magnetic path portions is smaller than a minimum width of each of the two adjacent magnetic path portions, and only the nonmagnetic layer is present between the two adjacent magnetic path portions.