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. 27, 2005
Filed:
Feb. 16, 2001
Toshinori Ono, Odawara, JP;
Yuuichi Kokaku, Yokohama, JP;
Yoshinori Honda, Hiratsuka, JP;
Shigehiko Fujimaki, Machida, JP;
Tooru Yatsue, Goleta, CA (US);
Toshinori Ono, Odawara, JP;
Yuuichi Kokaku, Yokohama, JP;
Yoshinori Honda, Hiratsuka, JP;
Shigehiko Fujimaki, Machida, JP;
Tooru Yatsue, Goleta, CA (US);
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Abstract
This magnetic recording medium is characterized in that in the magnetic recording medium having a magnetic film on a non-magnetic substrate by intercalating at least an under layer, the proportion of functional groups per 100 carbon atoms in a diamond-like carbon protective coating mainly composed of carbon for protecting the magnetic film exceeds 20%. The bonding force between the protective coating layer and the lubricating layer of the magnetic recording medium is increased so that under high speed rotation, a decrease in the lubricating layer is not caused so as to provide a magnetic recording apparatus having high reliability.