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:
Feb. 18, 2014
Filed:
Nov. 15, 2012
Applicants:
Kaori Kimura, Tokyo, JP;
Yoshiyuki Kamata, Tokyo, JP;
Satoshi Shirotori, Yokohama, JP;
Tsuyoshi Onitsuka, Hino, JP;
Inventors:
Kaori Kimura, Tokyo, JP;
Yoshiyuki Kamata, Tokyo, JP;
Satoshi Shirotori, Yokohama, JP;
Tsuyoshi Onitsuka, Hino, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C 1/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
A magnetic recording medium a magnetic recording medium includes a soft magnetic layer formed on a substrate, magnetic patterns made of a protruded ferromagnetic layer separated from each other on the soft magnetic layer, and a nonmagnetic layer formed between the magnetic patterns, a nitrogen concentration therein being higher on a surface side than on a substrate side.