The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2006
Filed:
Oct. 20, 2004
Alexander P. Payne, Ben Lomond, CA (US);
William C. Cain, Foothill Ranch, CA (US);
Michael E. Devillier, San Jose, CA (US);
Harold J. Hamilton, Santa Clara, CA (US);
Robert D. Hempstead, Los Gatos, CA (US);
Darren T. Imai, Los Gatos, CA (US);
Dimitre A. Latev, San Jose, CA (US);
David D. Roberts, Fremont, CA (US);
Alexander P. Payne, Ben Lomond, CA (US);
William C. Cain, Foothill Ranch, CA (US);
Michael E. Devillier, San Jose, CA (US);
Harold J. Hamilton, Santa Clara, CA (US);
Robert D. Hempstead, Los Gatos, CA (US);
Darren T. Imai, Los Gatos, CA (US);
Dimitre A. Latev, San Jose, CA (US);
David D. Roberts, Fremont, CA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
An information storage system includes a transducer having a loop of ferromagnetic material with pole tips separated by an nonferromagnetic gap located adjacent to a medium such as a rigid disk. During writing the separation between the pole tips and the media layer of the disk is a small fraction of the gap separation. Due to the small separation between the pole tips and the media layer, the magnetic field generated by the transducer and felt by the media has a larger perpendicular than longitudinal component, favoring perpendicular recording over longitudinal recording. The media may have an easy axis of magnetization oriented substantially along the perpendicular direction, so that perpendicular data storage is energetically favored. The transducer may also include a magnetoresistive sensor for reading magnetic information from the disk.