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:
Sep. 06, 2005
Filed:
Dec. 11, 2003
Masahiko Watanabe, Tokyo, JP;
Katsushi Yasuhara, Tokyo, JP;
Masahiko Watanabe, Tokyo, JP;
Katsushi Yasuhara, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A Mn—Zn based ferrite having a main component comprised of 51 to 54 mol % of an iron oxide in FeOconversion, 14 to 21 mol % of a zinc oxide in ZnO conversion and the rest of a manganese oxide, wherein a content (α [ppm]) of cobalt oxide in a CoO conversion with respect to 100 wt % of the main component satisfies a relation formula below.Relation formula: Y1≦α≦Y2  (1) Note that Y1 and Y2 are expressed by the formulas below and CoO>0 [ppm].1=(−0.13·+1.5·−15.6+850)/(0.0003·+0.0098)−233  (2)2=(−0.40·+4.6·−46.7+2546)/(0.0003·+0.0098)+1074  (3) The A and B in the above Y1 and Y2 are A=FeO(mol %) and B=ZnO (mol %).