Patent ID: 9286918
Filing Date: 2016-03-15
CPC Classification: G11B

Claim Text:
1. An apparatus comprising a write head having an air-bearing surface (ABS) and a rotating storage medium, the write head comprising: a main pole having a leading side and a trailing side engaging the medium after the leading side has engaged the medium, the main pole having a portion thereof closest to the ABS defining a pole tip; a trailing yoke having a portion thereof closest to the ABS defining a yoke tip; and a coil structure comprising at least two active turns aligned on the trailing side of the main pole and at least two active turns and one dummy turn aligned on the leading side of the main pole and, with the dummy turn more distal from the pole tip than the active turns, with a first turn of the at least two active turns on the trailing side having a cross-sectional diameter and its front edge a distance from the yoke tip that is no more than 20% of the active turn's diameter, and with the trailing yoke between the main pole and the at least two active turns on the trailing side of the main pole.