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:
Apr. 30, 2013
Filed:
Mar. 25, 2009
Paolo G. Sechi, Woodside, CA (US);
Paolo G. Sechi, Woodside, CA (US);
SRI International, Menlo Park, CA (US);
Abstract
A magnetic recording head for perpendicular magnetic recording includes energizing means, a recording pole, and a return pole. The recording pole narrows to a tip region with leading and trailing write edges separated by first and second side edges. The tip region provides a low reluctance path for magnetic flux generated by the energizing means. The return pole has a shield flare projecting towards the trailing write edge. A gap separates a leading edge of the shield flare from the trailing write edge. The shield flare diverts magnetic flux from reaching the tip region, thereby shielding the recording medium beneath the shield flare from the magnetic field while the side edges of the tip region and the recording medium beneath the gap are unshielded. A rear flare smoothes the discontinuity at the trailing edge of the return pole, thus reducing the peak magnetic field under the return pole.