The invention provides a magnetic head for perpendicular recording capable of
recording with high linear recording density and high track density, and a magnetic
disk drive incorporating the same. In order to achieve this, one or more sides
of the main pole of the magnetic head for perpendicular recording except for the
trailing side are formed in a taper with an appropriate angle against the tip surface
of the main pole, and the yoke whose widest principal plane is in parallel to the
tip surface is provided on the bottom of the main pole.
Thereby, the invention achieves the magnetic head for perpendicular recording
that generates a sufficiently high magnetic field, and assumes a sharp gradient
of magnetic field on the trailing side. By incorporating this magnetic head, a
magnetic disk drive capable of handling high linear recording density can be produced.