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:
Jul. 30, 2013
Filed:
Sep. 15, 2012
Suping Song, Fremont, CA (US);
Yuhui Tang, Milpitas, CA (US);
Tai Min, San Jose, CA (US);
Lijie Guan, Milpitas, CA (US);
Suping Song, Fremont, CA (US);
Yuhui Tang, Milpitas, CA (US);
Tai Min, San Jose, CA (US);
Lijie Guan, Milpitas, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A PMR writer is disclosed with an all wrap around design wherein the leading shield, side shields, and composite trailing shield are comprised of an anisotropic (−Ku) magnetic layer, and where the leading shield and side shields adjoin a gap layer. The composite shield has a first layer made of an isotropic magnetic material adjoining the write gap, and the anisotropic (−Ku) layer adjoins the first trailing shield layer on a side opposite the write gap. The main pole may have a tapered leading side and a tapered trailing side with the anisotropic (−Ku) leading shield and trailing shield layers extending a greater distance from the ABS than the ends of the tapered main pole sides. Adjacent track erasure is minimized while on-track write field and field gradient are improved.