Anna L Zheng

US Patent:

20200381012, Dec 3, 2020

Filed:

Aug 20, 2020

Appl. No.:

16/998989

Inventors:

- Addison TX, US
Zhigang BAI - Fremont CA, US
Yaguang WEI - Pleasanton CA, US
Anna ZHENG - San Jose CA, US
Supradeep NARAYANA - Santa Clara CA, US
Suping SONG - Fremont CA, US
Terence LAM - Cupertino CA, US
Michael Kouk San HO - Emerald Hills CA, US
Changqing SHI - San Ramon CA, US
Lijie GUAN - San Jose CA, US
Jian-Gang ZHU - San Jose CA, US

International Classification:

G11B 5/115
G11B 5/187

Abstract:

A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and a record element located in a trailing gap between the main pole and the trailing magnetic shield. The record element includes an electrically conductive, non-magnetic material portion which is not part of a spin torque oscillator stack. The main pole and the trailing magnetic shield are electrically shorted by the record element across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the record element.

US Patent:

20200327900, Oct 15, 2020

Filed:

Jun 24, 2020

Appl. No.:

16/911143

Inventors:

- San Jose CA, US
Alexander TARATORIN - Palo Alto CA, US
Anna ZHENG - San Jose CA, US
Venkatesh CHEMBROLU - Fremont CA, US
Supradeep NARAYANA - Santa Clara CA, US
Suping SONG - Fremont CA, US
Yaguang WEI - Pleasanton CA, US
Terence LAM - Cupertino CA, US
Michael Kuok San HO - Emerald Hills CA, US
Changqing SHI - San Ramon CA, US
Lijie GUAN - San Jose CA, US

International Classification:

G11B 5/31
G11B 5/147
G11B 5/23
G11B 5/127
G11B 5/235

Abstract:

A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.

US Patent:

20190267029, Aug 29, 2019

Filed:

Feb 15, 2019

Appl. No.:

16/277947

Inventors:

- San Jose CA, US
Alexander TARATORIN - Palo Alto CA, US
Anna ZHENG - San Jose CA, US
Venkatesh CHEMBROLU - Fremont CA, US
Supradeep NARAYANA - Santa Clara CA, US
Suping SONG - Fremont CA, US
Yaguang WEI - Pleasanton CA, US
Terence LAM - Cupertino CA, US
Michael Kuok San HO - Emerald Hills CA, US
Changqing SHI - San Ramon CA, US
Lijie GUAN - San Jose CA, US

International Classification:

G11B 5/147
G11B 5/31
G11B 5/23

Abstract:

A magnetic recording write head has an electrically-conductive structure in the write gap between the write pole and the trailing shield and electrical circuitry for directing current through the write gap. The current through the electrically-conductive structure generates a circular Ampere field which, at the disk-facing end of the write pole, is substantially parallel to the disk-facing end of the write pole. The electrically-conductive structure in the write gap may be a STO or an electrically-conductive layer that is not part of a STO. The current direction through the electrically-conductive structure in the write gap is selected so that the generated Ampere field at the write pole end is in substantially the same direction as the magnetization direction of the write head side shields, which has been discovered to result in minimization of cross-track interference.