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:
May. 09, 2006
Filed:
Sep. 10, 2004
Tomohiro Ichikawa, Kanagawa, JP;
Naoto Murao, Kanagawa, JP;
Tomohiro Ichikawa, Kanagawa, JP;
Naoto Murao, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
Provided is a magnetic recording medium affording good head contact and high output in addition to excellent head abrasion characteristics acceptable to high data transmission rates. The magnetic recording medium comprises a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a support. Said magnetic layer comprises an abrasive in a quantity of 2 to 5 weight percent with respect to the ferromagnetic powder, the number of protrusions having a height of 3 to 7 nm per 23,000 μmof a surface of the magnetic layer, measured by a non-contact three-dimensional structure analyzing microscope, ranges from 50 to 200, and said magnetic layer has a microindentation hardness ranging from 40 to 80 kg/mmat a load of 6 mgf.