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:
Sep. 11, 2018
Filed:
Sep. 14, 2016
Applicant:
Showa Denko K.k., Tokyo, JP;
Inventors:
Assignee:
SHOWA DENKO K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/65 (2006.01); G11B 19/28 (2006.01); G11B 21/10 (2006.01); G11B 5/72 (2006.01); G11B 5/725 (2006.01);
U.S. Cl.
CPC ...
G11B 19/28 (2013.01); G11B 5/72 (2013.01); G11B 5/725 (2013.01); G11B 21/106 (2013.01);
Abstract
In a magnetic recording medium of the present invention, an outermost surface of a protective layeron a lubricant layerside contains carbon and nitrogen in a range of 50 atomic % to 90 atomic %, and the lubricant layeris formed by being in contact with the outermost surface, contains compounds A to C represented in the below general formulas (1) to (3) described below, and has a film thickness of 0.5 nm to 2 nm.R1-CHOCHCH(OH)CHOCH—R2-CHOCHCH(OH)CHOH   (1),CH(OH)CH(OH)CHOCHCFCF(OCFCFCF)OCFCFCHOCHCH(OH)CHOH   (2),HOCHCFCFO(CFCFCFO)sCFCFCHOCHCH(OH)CHOH   ()