High Data Rate Writer Design

摘要

A magnetic write head is fabricated with its main pole attached to and magnetically coupled to a tapered yoke. The tapered yoke can be a top yoke (on the trailing side of the pole), a bottom yoke (on the leading side of the pole) or a combination of top and bottom configurations. The tapered portion of the yoke is at the distal end of the yoke and it is an extension of an otherwise uniformly thick yoke. It is found that the taper enables the yoke to be close to the ABS for better response times and a high data rate, while simultaneously being distant, producing less field disturbance by the shields and corresponding improvement of BER, and ATE/WATE. A taper of 45° is optimal for its production of uniform magnetization of the pole and optimal response times.

主权项

1. A magnetic write head comprising:
a main pole having a trailing side and a leading side and a distal end that terminates in a pole tip at an ABS of said write head; at least one tapered magnetic yoke having a side that is contiguous with and physically and magnetically coupled to at least one of said trailing side and said leading side of said main pole; wherein said at least one tapered magnetic yoke has a distal end that is closest to said ABS; and wherein said at least one tapered magnetic yoke is formed in two continuous portions, a first portion having a constant thickness, tty, along its length and a second portion extending distally from said first portion and forming a portion of reducing thickness in a distal direction that tapers at a constant angle θty with said main pole, said reducing thickness being reduced from said constant thickness, tty, to a zero thickness at a point of contiguity with said main pole and wherein said point of contiguity is at a distance dty from said ABS.