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:
Nov. 06, 2001
Filed:
Jan. 14, 2000
Satoshi Sato, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic recording medium exhibiting an excellent electromagnetic conversion characteristic and a satisfactory movement characteristic if an aromatic polyamide film is employed as a non-magnetic support member thereof. The magnetic recording medium according to the present invention incorporates a non-magnetic support member on which a magnetic layer constituted by a thin metal magnetic film is formed, wherein at least either main surface of the non-magnetic support member has small projections, and the either main surface of the non-magnetic support member having the small projections formed thereon has a kurtosis (Ku) which is 10.0 to 50.0, average roughness Ra at the central surface of either main surface of the non-magnetic support member is 1.0 nm to 5.0 nm, and average roughness Rz of ten points on either main surface of the non-magnetic support member is 15 nm to 50 nm.