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. 10, 2007
Filed:
Jul. 14, 2003
Satoshi Sato, Miyagi, JP;
Satoshi Sato, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
It is a magnetic recording medium for which favorable values for all of reproduced output, noise level and error rate can be obtained, and which is also superior in terms of storage stability. A magnetic recording medium (), which has a configuration in which a magnetic layer () comprised of a maghemite thin film containing cobalt is formed on a tape-shaped substrate () comprised of aromatic polyimide, and in which the substrate () is 3 to 10 μm in thickness, and 5 to 30 nm in its ten-point average roughness (SRz) of the surface on which the magnetic layer () is formed, and the magnetic layer () is 10 to 50 nm in thickness, 0.1 to 3.0 nm in center plane average thickness (SRa), and 2,000 to 4,000 Oe (158,000 to 316,000 A/m) in in-plane coercivity, is made.