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:
Feb. 15, 2005
Filed:
Sep. 10, 2001
Teruhiko Fujiwara, Sendai, JP;
Masayoshi Ishii, Sendai, JP;
Haruki Hoshi, Sendai, JP;
Keita Isogai, Sendai, JP;
Hatsuo Matsumoto, Sendai, JP;
Toru Ito, Miyagi, JP;
Tamiko Ambo, Tokyo, JP;
Teruhiko Fujiwara, Sendai, JP;
Masayoshi Ishii, Sendai, JP;
Haruki Hoshi, Sendai, JP;
Keita Isogai, Sendai, JP;
Hatsuo Matsumoto, Sendai, JP;
Toru Ito, Miyagi, JP;
Tamiko Ambo, Tokyo, JP;
NEC Tokin Corporaton, Miyagi, JP;
Abstract
In order to provide an inductance part having excellent DC superposition characteristic and core-loss, a magnetically biasing magnet, which is disposed in a magnetic gap of a magnetic core, is a bond magnet comprising magnetic powder and plastic resin with the content of the resin being 20% or more on the base of volumetric ratio and which has a specific resistance of 0.1Ω•cm or more. The magnetic powder used is rare-earth magnetic powder having an intrinsic coercive force of 5 kOe or more, Curie point of 300° C. or more, and an average particle size of 2.0-50 μm. A magnetically biasing magnet used in an inductance part that is treated by the reflow soldering method has a resin content of 30% or more and the magnetic powder used therein is Sm—Co magnetic powder having an intrinsic coercive force of 10 kOe or more, Curie point of 500° C. or more, and an average particle size of 2.5-50 μm. A thin magnet having a thickness of 500 μm or less can be realized for a small-sized inductance part.