Write heads having conducting side gap for directing current

US11557314B1 · kind B1 · utility

Assignee

• Western Digital Technologies, Inc. · US

Inventors

• Muhammad Asif Bashir · San Jose, US
• Zhigang Bai · Milpitas, US
• Yaguang Wei · Pleasanton, US
• Terence Lam · Cupertino, US
• Youfeng Zheng · San Jose, US
• Changqing Shi · San Ramon, US
• Michael Kuok San Ho · Redwood City, US
• Xinjiang Shen · Fremont, US
• Suping Song · Fremont, US
• Lijie Guan · San Jose, US
• Venkatesh Chembrolu · San Jose, US

Key dates

• Filing date: Jun 26, 2019
• Grant date: Jan 17, 2023
• Expiry date: Jun 26, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B2005/0024
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Embodiments of the present disclosure generally relate to magnetic recording systems, and more particularly to a magnetic recording system with a current-assisted write head. The write head comprises a main pole, a trailing shield disposed above the main pole, a trailing gap disposed between the main pole and the trailing shield, a side shield surrounding three sides of the main pole, the side shield being in contact with and disposed below the trailing shield and the trailing gap, and a side gap disposed between the side shield and each of the three sides of the main pole. The side gap comprises a non-magnetic electrically-conducting material to dissipate heat away from the main pole, lowering the resistance and temperature rise due to heating. The trailing gap may further comprise a non-magnetic electrically-conducting material. The write head may have a two terminal or three terminal connection configuration.