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:
Feb. 02, 2010
Filed:
Aug. 27, 2004
Yinshi Liu, Foster City, CA (US);
Nian-xiang Sun, Sunnyvale, CA (US);
Yunxiao Gao, Sunnyvale, CA (US);
Yimin Hsu, Sunnyvale, CA (US);
Tomohiro Okada, Odawara, JP;
Yasuyuki Okada, Odawara, JP;
Yinshi Liu, Foster City, CA (US);
Nian-Xiang Sun, Sunnyvale, CA (US);
Yunxiao Gao, Sunnyvale, CA (US);
Yimin Hsu, Sunnyvale, CA (US);
Tomohiro Okada, Odawara, JP;
Yasuyuki Okada, Odawara, JP;
Hitachi Global Storage Technologies Netherlands B.V,, Amsterdam, NL;
Abstract
A perpendicular write head includes a main pole comprising high moment magnetic layers laminated with both soft magnetic layers and non-magnetic layers for antiferromagnetic coupling (AFC) between the high moment material layers. The perpendicular write head includes a return pole connected to the main pole by a back gap closure at a distal end and separated from the main pole by a gap at an air bearing surface (ABS). A write coil is positioned between the main pole and the return pole and the surface area of the return pole at the ABS is substantially larger than the surface area of the main pole at the ABS.