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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 7551394 B1

PDFFull Text
Date of Patent:
Jun. 23, 2009

Filed:

Jul. 12, 2006

Magnetic head for perpendicular magnetic recording having a multilayer shield structure and method of manufacturing same

Applicants:

Yoshitaka Sasaki, Milpitas, CA (US);

Hiroyuki Itoh, Milpitas, CA (US);

Shigeki Tanemura, Milpitas, CA (US);

Hironori Araki, Milpitas, CA (US);

Dong-hong LI, Milpitas, CA (US);

Tatsushi Shimizu, Hong Kong, CN;

Tatsuya Shimizu, Hong Kong, CN;

Inventors:

Yoshitaka Sasaki, Milpitas, CA (US);

Hiroyuki Itoh, Milpitas, CA (US);

Shigeki Tanemura, Milpitas, CA (US);

Hironori Araki, Milpitas, CA (US);

Dong-Hong Li, Milpitas, CA (US);

Tatsushi Shimizu, Hong Kong, CN;

Tatsuya Shimizu, Hong Kong, CN;

Assignees:

Headway Technologies, Inc., Milpitas, CA (US);

SAE Magnetics (H.K.) Ltd., Hong Kong, CN;

Attorney:

Oliff & Berridge, PLC

Primary Examiner:

Jefferson Evans

Int. Cl.
CPC ...
G11B 5/187 (2006.01); G11B 5/39 (2006.01);
U.S. Cl.
CPC ...
Abstract

A magnetic head comprises a pole layer, a shield layer, a gap layer disposed between the pole layer and the shield layer, and a coil. The shield layer incorporates a first layer, a second layer, a third layer and a fourth layer that are disposed on the gap layer one by one. The first layer has an end face located in a medium facing surface. The second layer has: a first surface located in the medium facing surface; a second surface touching the first layer; and a third surface opposite to the second surface. The third layer touches the third surface of the second layer. An end face of each of the third and fourth layers closer to the medium facing surface is located at a distance from the medium facing surface.

Find Patent Forward Citations

Sasaki, Yoshitaka. (2009). Magnetic head for perpendicular magnetic recording having a multilayer shield structure and method of manufacturing same (U.S. Patent No. 7551394). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7551394

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

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