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:
Aug. 08, 2000
Filed:
Apr. 01, 1999
Ken-Ichi Nishimori, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
In a magnetic recording medium including a nonmagnetic substrate on which a magnetic layer, a protection film, and a lubricant film are successively stacked, the lubricant film is formed by quantitatively controlling an amount of a lubricant in consideration of a surface coverage ratio of the lubricant film relative to the protection film and an average thickness of the lubricant film. Preferably, the surface coverage ratio is selected between 0.55 and 0.985 while the average thickness is not smaller than 0.4 time an attenuation length of a photoelectron which is emitted from a predetermined element and which is attenuated in the lubricant film. To this end, an x-ray photoelectron spectroscopy is used to evaluate the lubricant film.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile