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:
Jan. 10, 2006
Filed:
Jan. 28, 2004
Osamu Kobayashi, Iwata-gun, JP;
Osamu Yamada, Iwata-gun, JP;
Kiyoshi Ito, Iwata-gun, JP;
Minebea Co., Ltd., Nagano, JP;
Abstract
An Mn—Zn ferrite includes base components of 44.0 to 49.8 mol % FeO, 4.0 to 26.5 mol % ZnO, at least one of 0.1 to 4.0 mol % TiOand SnO, 0.5 mol % or less MnO, and the remainder consisting of MnO, and contains 0.20 (0.20 excluded) to 1.00 mass % CaO as additive. Since the Mn—Zn ferrite contains less than 50 mol % FeOand a limited amount (0.5 mol % or less) of MnO, an abnormal grain growth does not occur even if CaO content is more than 0.20 mass %, and a high electrical resistance can be gained. And, since an appropriate amount of TiOand/or SnOis contained, an initial permeability is kept adequately high, whereby an excellent soft magnetism can be achieved in a high frequency band such as 1 MHz.