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:
Dec. 11, 2012
Filed:
Nov. 13, 2008
Kunliang Zhang, Fremont, CA (US);
Min LI, Dublin, CA (US);
Min Zheng, Milpitas, CA (US);
Fenglin Liu, Milpitas, CA (US);
Xiaomin Liu, Fremont, CA (US);
Kunliang Zhang, Fremont, CA (US);
Min Li, Dublin, CA (US);
Min Zheng, Milpitas, CA (US);
Fenglin Liu, Milpitas, CA (US);
Xiaomin Liu, Fremont, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A laminated high moment film with a non-AFC configuration is disclosed that can serve as a seed layer for a main pole layer or as the main pole layer itself in a PMR writer. The laminated film includes a plurality of (B/M) stacks where B is an alignment layer and M is a high moment layer. Adjacent (B/M) stacks are separated by an amorphous layer that breaks the magnetic coupling between adjacent high moment layers and reduces remanence in a hard axis direction while maintaining a high magnetic moment and achieving low values for Hch, Hce, and Hk. The amorphous material layer may be made of an oxide, nitride, or oxynitride of one or more of Hf, Zr, Ta, Al, Mg, Zn, Ti, Cr, Nb, or Si, or may be Hf, Zr, Ta, Nb, CoFeB, CoB, FeB, or CoZrNb. Alignment layers are FCC soft ferromagnetic materials or non-magnetic FCC materials.