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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 7041393 B1

PDFFull Text
Expired
Date of Patent:
May. 09, 2006

Filed:

Feb. 04, 2003

Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the same

Applicants:

Kiwamu Tanahashi, Kokubunji, JP;

Atsushi Kikugawa, Higashimurayama, JP;

Yoshio Takahashi, Koganei, JP;

Yuzuru Hosoe, Hino, JP;

Inventors:

Kiwamu Tanahashi, Kokubunji, JP;

Atsushi Kikugawa, Higashimurayama, JP;

Yoshio Takahashi, Koganei, JP;

Yuzuru Hosoe, Hino, JP;

Assignee:

Hitachi Global Storage Technologies Japan, Ltd., Kanagawa-kem, JP;

Attorneys:

Reed Smith LLP

Stanley P. Fisher, Esq.

Juan Carlos A. Marquez, Esq.

Primary Examiner:

Holly Rickman

Int. Cl.
CPC ...
G11B 5/66 (2006.01); G11B 5/70 (2006.01);
U.S. Cl.
CPC ...
Abstract

A perpendicular recording medium includes a perpendicular recording layer formed over a substrate through a soft magnetic underlayer, the soft magnetic underlayer then being arranged to include a plurality of soft magnetic layers physically separated by a non-magnetic layer, and further, the soft magnetic layers being formed of nanocrystals, with these arrangements, local magnetic loops are formed between the soft magnetic layers that are adjacent to each other through the non-magnetic layer, thereby suppressing spike noise and modulation that arises from the soft magnetic underlayer.

Find Patent Forward Citations

Tanahashi, Kiwamu. (2006). Perpendicular magnetic recording media, manufacturing process of the same, and magnetic storage apparatus using the same (U.S. Patent No. 7041393). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7041393

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

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