Patent ID: 7477483
Filing Date: 2009-01-13
Classification: G11B

Abstract:
1. A perpendicular magnetic recording head for recording magnetic data on a recording medium, the perpendicular magnetic recording head comprising a first magnetic portion, a second magnetic portion disposed leaving a space to the first magnetic portion, and a coil layer which is disposed in the space between the first magnetic portion and the second magnetic portion and which applies a recording magnetic field to the first magnetic portion and the second magnetic portion, wherein a yoke layer is disposed in contact with the second magnetic portion, and a width dimension in a direction orthogonal to a height direction of a front end of the yoke layer is increased stepwise or continuously toward a rear of the yoke layer in the height direction and is increased stepwise or continuously in a direction farther from the second magnetic portion, wherein a saturation magnetic flux density of the yoke layer increases with increasing proximity to the second magnetic portion.