Magnetic head with current assisted magnetic recording and method of making thereof

US10891974B1 · kind B1 · utility

Assignee

• Sandisk Technologies, Inc. · US

Inventors

• Venkatesh Chembrolu · San Jose, US
• Zhigang Bai · Milpitas, US
• Yaguang Wei · Pleasanton, US
• Anna Zheng · San Jose, US
• Supradeep Narayana · San Jose, US
• Suping Song · Fremont, US
• Terence Lam · Cupertino, US
• Michael Ho · San Jose, US
• Changqing Shi · San Ramon, US
• Lijie Guan · San Jose, US
• Jian Zhu · Pittsburgh, US

Key dates

• Filing date: Jun 5, 2018
• Grant date: Jan 12, 2021
• Expiry date: Jun 5, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B2005/0021
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

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.