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:
Jul. 24, 2007
Filed:
Feb. 07, 2005
Kazuhiro Hattori, Chuo-ku, JP;
Shuichi Okawa, Chuo-ku, JP;
Takahiro Suwa, Chuo-ku, JP;
Mikiharu Hibi, Chuo-ku, JP;
Kazuhiro Hattori, Chuo-ku, JP;
Shuichi Okawa, Chuo-ku, JP;
Takahiro Suwa, Chuo-ku, JP;
Mikiharu Hibi, Chuo-ku, JP;
TDK Corporation, Tokyo, JP;
Abstract
A method for manufacturing a magnetic recording medium is provided, which can efficiently manufacture a magnetic recording medium that includes a recording layer formed in a concavo-convex pattern, has a sufficiently flat surface, and provides good recording and reproduction precision. The method includes: a non-magnetic material filling step of depositing a non-magnetic material over a recording layer formed in a predetermined concavo-convex pattern over a substrate, thereby filling a concave portion of the concavo-convex pattern with the non-magnetic material; and a flattening step of removing the excess part of the non-magnetic material above the recording layer by ion beam etching to flatten the surfaces of the non-magnetic layer and the recording layer.