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. 30, 2003
Filed:
Dec. 19, 2000
Masahiro Hatakeyama, Fujisawa, JP;
Katsunori Ichiki, Fujisawa, JP;
Kenji Watanabe, Fujisawa, JP;
Kazuo Yamauchi, Yokohama, JP;
Shinta Kunitomo, Fujisawa, JP;
Yasushi Tohma, Osaka, JP;
Tohru Satake, Chigasaki, JP;
Ebara Corporation, Tokyo, JP;
Abstract
A magnetic recording disk having on its surface a texture structure of fine surface irregularities with reduced variations, which is suitable for high-density magnetic recording, and a method of manufacturing such a magnetic recording disk are provided. A magnetic recording disk has a substrate ( ) coated on a surface thereof with a magnetic layer , a carbon layer , and a lubricating film . The substrate has on a surface thereof a texture structure of fine surface irregularities for reducing friction when the substrate is brought into contact with a head and controlling an amount of lift of the head. The fine surface irregularities have a height of 20 nm or less and are formed from a pattern shape or profile of a shield with a high-speed atomic beam emitted from a high-speed atomic beam source.