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. 14, 2000
Filed:
Mar. 31, 1998
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
The present invention discloses a magnetic tape for use in a magnetic recording/reproduction system having a relative speed of 15 m/s or more between a tape and a head for recording and reproducing the tape; the magnetic tape having at least one magnetic layer provided on a nonmagnetic support, the magnetic layer comprising an Al-containing ferromagnetic powder and alumina dispersed in a binder, and a backcoat layer provided on the surface of the nonmagnetic support opposite to the magnetic layer, wherein the intensity ratio between Al and Fe (Al/Fe), as measured by ESCA, in the surface of the magnetic layer is 0.15 to 0.25. The use of this magnetic tape enables improved electromagnetic characteristics and durability to be achieved at a high recording density and a high transfer speed.