Magnetic transducer for perpendicular magnetic recording with single pole write head with trailing shield

US7009812B2 · kind B2 · utility

Assignee

• Hitachi Global Storage Technologies Netherlands B.V. · NL

Inventors

• Yimin Hsu · Sunnyvale, US
• Quang Le · San Jose, US
• Hin P. E. Lee · San Jose, US
• James L. Nix · Tucson, US
• Aron Pentek · San Jose, US
• Kurt A. Rubin · Santa Clara, US
• Neil Smith · San Diego, US
• Nian-Xiang Sun · Winchester, US
• Walter Weresin · San Jose, US
• Mason Williams · San Jose, US

Key dates

• Filing date: Sep 29, 2003
• Grant date: Mar 7, 2006
• Expiry date: Dec 7, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B5/6005
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The invention is a magnetic transducer with separated read and write heads for perpendicular recording. The write head has a trailing shield that extends from the return pole piece toward the main pole piece to form the write gap at the air-bearing surface. One embodiment of the trailing shield is a two part structure with a pedestal and a much smaller tip that confronts the main pole piece at the gap. In one embodiment a sink of non-magnetic, electrically conductive material is disposed in the separation gap between the read head and the flux bearing pole piece. The sink is preferably made of copper and does not extend to the ABS.