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. 01, 2005
Filed:
Feb. 06, 2003
Kuniharu Fujiki, Mito, JP;
Kuniharu Fujiki, Mito, JP;
JVC Victor Company of Japan, Ltd., Kanagawa-ken, JP;
Abstract
On a polymeric substrate, there is formed with a single magnetic layercontaining a ferromagnetic metal and oxygen. The magnetic layeris divided into three regions equally in the depth direction from the polymeric substrateto the surface of the magnetic layer, wherein the three regions are defined as a first regiona second regionand a third regionrespectively in accordance with a process of forming the magnetic layer. With defining that a maximum value of oxygen concentration in the first regionis 'Max', a minimum value of oxygen concentration in the second regionis 'Min', and a maximum value of oxygen concentration in the third regionis “Max” respectively, these values “Max”, “Min” and “Max” have relations of “Min”<“Max” and “Min”≦“Max”≦“Max