Magnetoresistive read sensor with short permanent magnets

US6930865B2 · kind B2 · utility

Assignee

• Seagate Technology LLC · US

Inventors

• Mai Ghaly · Bloomington, US
• David J. Larson · Huntington Station, US
• Paul E. Anderson · Eden Prairie, US
• Kristin Duxstad · Eden Prairie, US
• Brenda A. Everitt · Minneapolis, US
• Patrick J. Moran · Arnold, US
• Steven B. Slade · New Hope, US
• Eric W. Singleton · Pretoria, ZA

Key dates

• Filing date: Jan 21, 2003
• Grant date: Aug 16, 2005
• Expiry date: Jul 8, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49052
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A transducing head has a magnetoresistive sensor, a first bias element, and a second bias element. The magnetoresistive sensor is positioned between the first and second bias elements, and has a sensor width. The first bias element has a first length and the second bias element has a second length. The direction of the first and second lengths are substantially similar to the direction of the sensor width. The first and second lengths in the range of about one-tenth to about twenty times the sensor width.