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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.:

US 12567438 B1

PDFFull Text
Date of Patent:
Mar. 03, 2026

Filed:

Dec. 27, 2023

Magnetic heads having low magnetic coercivity (hc) and high saturated magnetic flux density (bs) in ferromagnetic (fm) layer(s) or shield(s) with minimized saturation

Applicant:

Western Digital Technologies, Inc., San Jose, CA (US);

Inventors:

Quang Le, San Jose, CA (US);

Brian R. York, San Jose, CA (US);

Xiaoyong Liu, San Jose, CA (US);

Jinming Liu, San Jose, CA (US);

Son T. Le, San Jose, CA (US);

Michael A. Gribelyuk, San Jose, CA (US);

Susumu Okamura, San Jose, CA (US);

Hisashi Takano, Fujisawa, JP;

Assignee:

Western Digital Technologies, Inc., San Jose, CA (US);

Attorney:

Patterson + Sheridan, LLP

Primary Examiner:

Craig A Renner

Int. Cl.
CPC ...
G11B 5/31 (2006.01); G11B 5/127 (2006.01); G11B 5/235 (2006.01); G11B 5/39 (2006.01); G11B 5/00 (2006.01);
U.S. Cl.
CPC ...
G11B 5/1278 (2013.01); G11B 5/235 (2013.01); G11B 5/314 (2013.01); G11B 5/3146 (2013.01); G11B 5/315 (2013.01); G11B 5/3909 (2013.01); G11B 5/3912 (2013.01); G11B 2005/0024 (2013.01);
Abstract

Magnetic moments can be increased in hard disk drive (HDD) shields and ferromagnetic layers to minimize magnetic saturation while still maintaining low magnetic coercivity (Hc) and high saturated magnetic flux (Bs). A textured layer can be used to induce nucleation and growth of an interfacial nature such that body centered cubic (BCC) ferromagnetic materials with high Bs and low Hc are obtained while also increasing the magnetic moment. The textured layer will cause the ferromagnetic material to grow with low Hc regardless of the crystallographic orientation.

Find Patent Forward Citations

Le, Quang. (2026). Magnetic heads having low magnetic coercivity (hc) and high saturated magnetic flux density (bs) in ferromagnetic (fm) layer(s) or shield(s) with minimized saturation (U.S. Patent No. 12567438). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12567438

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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