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:
Apr. 17, 2012
Filed:
Mar. 23, 2009
Applicants:
Isao Nakahata, Tokyo, JP;
Tomokazu Ishikura, Tokyo, JP;
Takuya Aoki, Tokyo, JP;
Inventors:
Assignee:
TDK Corporation, Chuo-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 1/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
The ferrite sintered body of the present invention contains main components consisting of 52 to 54 mol % FeO, 35 to 42 mol % MnO and 6 to 11 mol % ZnO as oxide equivalents and additives including Co, Ti, Si and Ca in specified amounts, and has a temperature at which the power loss is a minimal value (bottom temperature) of higher than 120° C. in a magnetic field with an excitation magnetic flux density of 200 mT and a frequency of 100 kHz, and a power loss of 350 kW/mor less at the bottom temperature.