Patent · US Active

Double shell writers

US8649124B2 · kind B2 · utility

7Cited by

12References

17Claims

0Family size

Assignee

Seagate Technology LLC · US

Inventors

Jie Zou · Eden Prairie, US
David Christopher Seets · Excelsior, US
James Gary Wessel · Savage, US
Jianhua Xue · Maple Grove, US
Lixin Jia · Minneapolis, US

Key dates

Filing date	Dec 13, 2010
Grant date	Feb 11, 2014
Priority date	—
Expiry date	Dec 30, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/315
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus illustratively includes a return pole (RP) and a shield. The RP has a first RP magnetic layer, a second RP magnetic layer, and a RP non-magnetic layer. The RP non-magnetic layer separates and magnetically decouples the RP first and second magnetic layers. The shield has a first shield magnetic layer, a second shield magnetic layer, and a shield non-magnetic layer. The shield non-magnetic layer separates and magnetically decouples the shield first and second magnetic layers. A method illustratively includes generating magnetic flux and collecting the magnetic flux through an inner magnetic shell.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.