Patent ID: 7428123
Filing Date: 2008-09-23
Classification: G11B

Abstract:
1. A perpendicular magnetic recording head, comprising: a first magnetic portion; a second magnetic portion formed with a gap from the first magnetic portion; and a coil layer located in the gap between the first magnetic portion and the second magnetic portion for applying a recording magnetic field to the first magnetic portion and the second magnetic portion; and wherein the second magnetic portion includes a front end portion having a track width on a surface opposed to a recording medium and a large-width portion having a width larger than that of the front end portion, a yoke layer is formed to overlap with a portion of the second magnetic portion close to the first magnetic portion, a width in a front end portion of the yoke layer formed to be wider than both sides in the track width direction of the second magnetic portion and increases stepwise or continuously in a height direction, and the thickness at a position of the front portion of the yoke portion overlapping with the second magnetic portion stepwise or continuously increases in the height direction, and wherein a front end portion extending in a direction coming closer to the second magnetic portion is formed on a side of the first magnetic portion opposed to the recording medium, and the front end portion of the first magnetic portion and the yoke layer located between the first magnetic portion and the second magnetic portion are opposed to each other in the height direction.