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. 25, 2006
Filed:
Aug. 31, 2004
Kensaku Asakura, Tokyo, JP;
Takuya Aoki, Tokyo, JP;
Taku Murase, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A ferrite material having a high Q value and also having a small absolute value of αμir in a wide temperature range between −40° C. and 160° C. A ferrite material, which comprises, as main constituents, 45.5 to 48 mol % of FeO, 5 to 10.5 mol % of CuO, 26 to 30 mol % of ZnO, and the balance substantially being NiO, and further comprises, as an additive, cobalt oxide within a range between 0.005 and 0.045 wt % in terms of CoO. The ferrite material of the present invention has properties such as each of the absolute value of αμirand the absolute value of αμirof 3 ppm/° C. or less, and a Q value at 125 kHz of 170 or more.