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:
Mar. 19, 1996
Filed:
Jan. 21, 1994
Youichi Inoue, Ryugasaki, JP;
Yoshihiro Sato, Ibaraki, JP;
Shinichi Hirose, Tsukuba, JP;
Hiroshi Tani, Atsugi, JP;
Katsuyuki Tanaka, Ibaraki, JP;
Katsuo Abe, Odawara, JP;
Masaki Ohura, Odawara, JP;
Muneo Mizumoto, Tsuchiura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present invention provides a magnetic recording medium wherein the surface layer of the protective film of the medium is irradiated by ions to give a protective film having high reliability in resistance to sliding with the magnetic head, a process for producing the medium, an apparatus for producing the medium, and a magnetic recording apparatus having the medium mounted therein. The essentials of the present invention lie in introducing a minute surface roughness of atomic order in the surface of the protective film 5 constituting the outermost layer of a magnetic recording medium by irradiating atoms accelerated by high voltage (that is, by implanting ions) to the surface.