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:
Mar. 30, 2004
Filed:
Aug. 13, 2002
Fuji Photo Film Co. Ltd., Kanagawa, JP;
Abstract
Provided is a magnetic recording medium having improved electromagnetic characteristics, particularly, in which the C/N ratio in the high-density recording region is markedly improved. The magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder in this order on a support. The number of magnetic aggregates present in the magnetic layer that are equal to or higher than 0.5 &mgr;m in size and have a magnetic intensity equal to or greater than 20 times the average value of magnetization turbulence obtained from a magnetic force image measured by a magnetic force microscope is equal to or less than 100/2,000 &mgr;m .