Patent ID: 7951415
Filing Date: 2011-05-31
Classification: G11B,Y10T

Abstract:
1. A method of manufacturing a magnetic head for perpendicular magnetic recording, the magnetic head comprising: a medium facing surface that faces toward a recording medium; a coil for generating a magnetic field corresponding to data to be written on the recording medium; a pole layer having an end located in the medium facing surface, the pole layer allowing a magnetic flux corresponding to the magnetic field generated by the coil to pass therethrough, and generating a write magnetic field for writing the data on the recording medium through the use of a perpendicular magnetic recording system; and a substrate on which the pole layer and the coil are stacked, wherein: the end of the pole layer located in the medium facing surface has: a first side close to the substrate; a second side located opposite to the first side; a third side connecting an end of the first side to an end of the second side; and a fourth side connecting the other end of the first side to the other end of the second side; the second side defines a track width; and the end of the pole layer has a width that decreases as a distance from the first side decreases, the method comprising the steps of: forming a pole-layer-encasing layer made of a nonmagnetic material and having a groove in which the pole layer is placed; forming a nonmagnetic film made of a nonmagnetic insulating material or a nonmagnetic semiconductor material in the groove; forming the pole layer in the groove after the nonmagnetic film is formed, such that the nonmagnetic film is disposed between the pole-layer-encasing layer and the pole layer; and forming the coil, wherein the nonmagnetic film is made of any of alumina, silicon oxide, silicon oxynitride, polycrystalline silicon, and amorphous silicon.