Patent ID: 9704513
Date: 2017-07-11
CPC Classifications: G11B

Claim:
1. A magnetic head for perpendicular magnetic recording, comprising: a medium facing surface configured to face a recording medium; a coil for producing a magnetic field corresponding to data to be written on the recording medium; a main pole having an end face located in the medium facing surface, the main pole being configured to pass a magnetic flux corresponding to the magnetic field produced by the coil, and to produce a write magnetic field for use to write the data on the recording medium by means of a perpendicular magnetic recording system; and a first return path section formed of a magnetic material, wherein the first return path section includes a first yoke section and a first coupling section, and defines a first space between the main pole and itself, the first yoke section being located on a front side in a direction of travel of the recording medium relative to the main pole, the first coupling section being located away from the medium facing surface and coupling the first yoke section to the main pole, the first coupling section has a first contact surface in contact with the main pole, the coil includes a first winding portion and a second winding portion connected in series, the first winding portion includes a first coil element extending to pass through the first space, and extends once around an entire perimeter of the first coupling section, the second winding portion extends less than once around the entire perimeter of the first coupling section, thus surrounding only ½ to ¾ of the entire perimeter of the first coupling section, and no portion of the coil except the first coil element lies in the first space.