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. 11, 2020
Filed:
Dec. 16, 2015
Showa Denko K.k., Tokyo, JP;
Satoru Nakamura, Hsinchu, TW;
Taining Hung, Hsinchu, TW;
Evance Kuo, Hsinchu, TW;
Daizo Endo, Hsinchu, TW;
SHOWA DENKO K.K., Minato-ku, Tokyo, JP;
Abstract
The present invention relates to a magnetic recording medium in which a lubricant layer contains a compound A represented by general formula (1) and a compound B represented by general formula (2), satisfying (A/B)=0.2 to 3.0, and has an average thickness of 0.8 nm to 2 nm. R—CHOCHCH(OH)CHOCH—R—CHOCHCH(OH)CHOH . . . (1) (Ris an alkoxy group having 1 to 4 carbon atoms. Ris —CFO(CFCFO)(CFO)CF— (x, y=0 to 15), —CFCFO(CFCFCFO)CFCF— (z=1 to 15), —CFCFCFO(CFCFCFCFO)CFCFCF— (n=0 to 4). HOCHCFCFO(CFCFCFO)CFCFCHOCHCH(OH)CHOH . . . (2) (m is an integer).