Write head having two yokes

摘要

A write head comprising a main pole having a pole tip proximate an air bearing surface (ABS), a leading side and a trailing side, with a leading yoke on the leading side of the main pole and a trailing yoke on the leading side of the main pole. The leading yoke has a greater thickness than the trailing yoke, with a ratio of the thickness of the leading yoke to the trailing yoke of at least 1.5:1.

主权项

1. A write head comprising:
a main pole having a pole tip proximate an air bearing surface (ABS), the main pole having a leading side and a trailing side; a leading yoke on the leading side of the main pole; a trailing yoke on the trailing side of the main pole; and a coil structure around the main pole and yokes, the coil structure comprising no more than two active turns and a dummy turn, the dummy turn located more distal from the pole tip than the no more than two active turns; wherein a ratio of a thickness of the leading yoke to a thickness of the trailing yoke is at least 1.5:1.