Patent ID: 8098456

Claim:
A perpendicular magnetic recording head, comprising: a data recording module comprising a main pole, a return pole, and a coil wrapped around the main pole; and a data reproduction module comprising magnetic shield layers and a reading device located between the magnetic shield layers, wherein the perpendicular magnetic recording head is configured to record recording information on a recording medium disposed in a downward direction from the perpendicular magnetic recording head, wherein a width of a lower end of the main pole is gradually reduced in the downward direction, and the lower end of the main pole comprises a first part and a second part extending from the first part, the first part having a curved surface of a first curvature and the second part having a curved surface of a second curvature, and wherein the first curvature is such that the width of the first part decreases at a decreasing rate in a direction approaching the second part from the first part.