公开(公告)号：US10832710B1

公开(公告)日：2020-11-10

申请号：US16564704

申请日：2019-09-09

Applicant: Western Digital Technologies, Inc.

Inventor： Suping Song ,  Zhanjie Li ,  Terence Lam ,  Lijie Guan

IPC: G11B5/31 ,  G11B5/235 ,  G11B5/012 ,  G11B5/127 ,  G11B5/02 ,  G11B5/11

Abstract: Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.

公开(公告)号：US10679650B2

公开(公告)日：2020-06-09

申请号：US16277953

申请日：2019-02-15

Applicant: Western Digital Technologies, Inc.

Inventor： Zhigang Bai ,  Venkatesh Chembrolu ,  Yaguang Wei ,  Terence Lam ,  Michael Kuok San Ho ,  Lijie Guan ,  Suping Song ,  Supradeep Narayana

IPC: G11B5/235 ,  G11B5/23 ,  G11B5/127 ,  G11B5/31

Abstract: A current-assisted magnetic recording write head has an electrically conductive layer in the write gap between the write pole and the trailing shield. Electrical circuitry directs current from the write pole, through the conductive layer, to the trailing shield. The current through the conductive layer generates an Ampere field substantially orthogonal to the magnetization in the write pole to assist magnetization switching of the write pole. The write head's magnetic throat height (THm) is substantially the thickness of the trailing shield at the write gap, while the write head's electrical throat height (THe) is substantially the height of the conductive layer in the write gap. In embodiments of this invention, the signal-to-noise ratio (SNR) of the readback signal and the soft error rate (SER) of the recorded data can be improved with a write gap structure wherein THe is greater than THm.