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:
Oct. 05, 2010
Filed:
Dec. 20, 2006
Applicants:
Matahiro Komuro, Hitachi, JP;
Yuichi Satsu, Hitachi, JP;
Takao Imagawa, Mito, JP;
Katsumi Ishikawa, Hitachinaka, JP;
Takeyuki Itabashi, Hitachi, JP;
Yuzo Kozono, Hitachiota, JP;
Inventors:
Matahiro Komuro, Hitachi, JP;
Yuichi Satsu, Hitachi, JP;
Takao Imagawa, Mito, JP;
Katsumi Ishikawa, Hitachinaka, JP;
Takeyuki Itabashi, Hitachi, JP;
Yuzo Kozono, Hitachiota, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/053 (2006.01); H01F 1/055 (2006.01); H01F 1/057 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lamellar high resistance layer having resistivity ten times or higher than that of a mother phase containing iron or cobalt is formed and an oxygen content is controlled to 10 to 10000 ppm so that the reliability and residual magnetic flux density are increased.