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:
Nov. 29, 2005
Filed:
Apr. 18, 2003
Tomoe Sato, Kanagawa, JP;
Tetsuo Samoto, Miyagi, JP;
Shinya Yoshida, Miyagi, JP;
Hitoshi Wako, Miyagi, JP;
Takashi Kanou, Miyagi, JP;
Naoki Ikeda, Miyagi, JP;
Kazuhiko Suzuki, Miyagi, JP;
Seiichi Onodera, Miyagi, JP;
Tomoe Sato, Kanagawa, JP;
Tetsuo Samoto, Miyagi, JP;
Shinya Yoshida, Miyagi, JP;
Hitoshi Wako, Miyagi, JP;
Takashi Kanou, Miyagi, JP;
Naoki Ikeda, Miyagi, JP;
Kazuhiko Suzuki, Miyagi, JP;
Seiichi Onodera, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
There is provided a magnetic recording medium which exhibits superior lubricating properties and superior tape-transport properties as well as superior robustness even in a low-temperature environment. A magnetic layer containing a ferromagnetic metal is formed on a nonmagnetic support, and a protecting film is formed on the magnetic layer. A lubricant auxiliary coating composition comprising an aromatic alcohol is applied to the protecting film to form a lubricant auxiliary layer, and a lubricant coating composition comprising a compound represented by the formula (1) below is applied to the lubricant auxiliary layer to form a lubricant layer.RCH(COOR)CHCOOR  (1)wherein Rrepresents an aliphatic alkyl group, an aliphatic alkenyl group, or a hydrogen atom, and each of Rand Rindependently represents a fluoroalkyl group, a fluoroalkenyl group, a fluoropolyether group, or a hydrogen atom.