Patent ID: 7457080
Filing Date: 2008-11-25
Classification: G11B

Abstract:
1. A perpendicular magnetic recording head, comprising: a thin film coil generating a magnetic flux; a pole layer extending from an air bearing surface facing a recording medium to the rear, and guiding the magnetic flux to the recording medium so that the recording medium is magnetized in a direction orthogonal to a surface of the recording medium; and a magnetic layer extending from the air bearing surface to the rear on a trailing side of the pole layer, the magnetic layer being separated from the pole layer by a gap layer on a side closer to the air bearing surface, and being connected to the pole layer on a side further from the air bearing surface, wherein the pole layer includes: a main pole layer extending from the air bearing surface to the rear on a leading side; and an auxiliary pole layer extending from a position at the rear of the air bearing surface to the rear on a trailing side, in the pole layer, the main pole layer and the auxiliary pole layer are laminated, and the magnetic layer includes: a first magnetic layer portion being provided on the same level as the auxiliary pole layer in a direction in which the main pole layer and the auxiliary pole layer are laminated, being separated from the main pole layer by the gap layer, and extending from the air bearing surface to a position at the front of the auxiliary pole layer, a second magnetic layer portion extending from the air bearing surface to the rear on a trailing side of the first magnetic layer portion and the auxiliary pole layer, being connected to the first magnetic layer portion on a side closer to the air bearing surface, and being connected to the auxiliary pole layer on a side further from the air bearing surface, and in the magnetic layer, the first magnetic layer portion and the second magnetic layer portion are laminated.