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:
Apr. 07, 2009
Filed:
Nov. 04, 2004
Norikazu Nakamura, Kawasaki, JP;
Tsukasa Itani, Kawasaki, JP;
Yukiko Oshikubo, Kawasaki, JP;
Shinichi Nakayama, Higashine, JP;
Takashi Toyoguchi, Higashine, JP;
Norikazu Nakamura, Kawasaki, JP;
Tsukasa Itani, Kawasaki, JP;
Yukiko Oshikubo, Kawasaki, JP;
Shinichi Nakayama, Higashine, JP;
Takashi Toyoguchi, Higashine, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A magnetic recording medium having excellent durability and corrosion resistance as well as a magnetic recording device equipped with the magnetic recording medium is provided. The protective layer of the magnetic recording medium is composed of two layers, that is, a lower layer contacting with the magnetic layer and an upper layer on the lower layer. The internal stress of the lower layer is made smaller than that of the upper layer, and the surface free energy of the lower layer is made smaller than that of the upper layer.