| 摘要 |
A magnetic head includes a coil, a main pole, a trailing shield, a gap section, a return path section, and a coil underlayer. The main pole has a top surface including a first inclined portion and a flat portion. The coil includes a specific coil element. The specific coil element has a bottom surface facing toward the top surface of the main pole, and a front end face inclined with respect to a medium facing surface. The coil underlayer lies under the specific coil element, and has a front end face. The trailing shield includes a portion interposed between the front end face of the coil underlayer and the medium facing surface. The bottom surface of the specific coil element includes a second inclined portion. |
| 主权项 |
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; a trailing shield formed of a magnetic material and having an end face located on a front side in a direction of travel of the recording medium relative to the end face of the main pole; a gap section formed of a nonmagnetic material and located between the main pole and the trailing shield; a return path section formed of a magnetic material and located on the front side in the direction of travel of the recording medium relative to the main pole; and a coil underlayer formed of a nonmagnetic material, wherein the return path section connects the trailing shield and part of the main pole located away from the medium facing surface to each other so that a space is defined by the main pole, the gap section, the trailing shield and the return path section, the coil includes at least one first coil element extending to pass through the space, the main pole has a top surface located at a front-side end of the main pole in the direction of travel of the recording medium, the top surface of the main pole includes a first inclined portion and a flat portion, the first inclined portion being located closer to the medium facing surface than the flat portion, the first inclined portion has a first end located in the medium facing surface and a second end opposite to the first end, the first inclined portion is inclined with respect to the medium facing surface and a direction perpendicular to the medium facing surface such that the second end is located on the front side in the direction of travel of the recording medium relative to the first end, the flat portion extends substantially perpendicular to the medium facing surface, the at least one first coil element includes a specific coil element, the specific coil element has a bottom surface facing toward the top surface of the main pole, and a front end face facing toward the medium facing surface, the front end face of the specific coil element has a third end closest to the main pole, and a fourth end opposite to the third end, the front end face of the specific coil element is inclined with respect to the medium facing surface and the direction perpendicular to the medium facing surface such that the fourth end is located at a greater distance from the medium facing surface than is the third end, the coil underlayer lies under at least the specific coil element of the coil, and has a front end face facing toward the medium facing surface, the trailing shield includes a portion interposed between the front end face of the coil underlayer and the medium facing surface, the bottom surface of the specific coil element includes a second inclined portion, the second inclined portion has a fifth end closest to the medium facing surface, and a sixth end opposite to the fifth end, the fifth end coincides with the third end of the front end face of the specific coil element, the second inclined portion is inclined with respect to the medium facing surface and the direction perpendicular to the medium facing surface such that the sixth end is located on the front side in the direction of travel of the recording medium relative to the fifth end, and the front end face of the specific coil element is inclined at a greater angle with respect to the direction perpendicular to the medium facing surface than is the second inclined portion. |
