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:
Feb. 01, 2011
Filed:
Feb. 05, 2004
Applicants:
Yoshihiko Minachi, Tokyo, JP;
Noboru Ito, Tokyo, JP;
Inventors:
Yoshihiko Minachi, Tokyo, JP;
Noboru Ito, Tokyo, JP;
Assignee:
TDK Corporation, , JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/65 (2006.01);
U.S. Cl.
CPC ...
Abstract
A ferrite magnet powder is represented by the composition formula AFeMFeO, wherein A represents at least one element selected from the group consisting of Sr, Ba, and Pb; and M represents at least one element selected from the group consisting of Zn, Co, Mn, and Ni, and wherein 0.05≦x≦0.80, 1.5≦a≦2.2, and 12≦b≦17. A high saturation magnetization 4πIs can be achieved by the partial substitution of the Fesite of a W-type ferrite with an element M such as Zn within a certain range.