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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.:

US 11014826 B1

PDFFull Text
Date of Patent:
May. 25, 2021

Filed:

Feb. 22, 2017

Ferrite particles, resin composition and resin film

Applicant:

Powdertech Co., Ltd., Chiba, JP;

Inventors:

Takashi Kojima, Chiba, JP;

Kazutaka Ishii, Chiba, JP;

Takao Sugiura, Chiba, JP;

Tetsuya Igarashi, Chiba, JP;

Koji Aga, Chiba, JP;

Assignee:

POWDERTECH CO., LTD., Chiba, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Matthew E Hoban

Assistant Examiner:

Lynne Edmondson

Int. Cl.
CPC ...
H01F 1/36 (2006.01); H01F 1/37 (2006.01); H01F 1/375 (2006.01); C01G 49/00 (2006.01); C08K 3/22 (2006.01); C08L 101/00 (2006.01); C30B 29/22 (2006.01); C08K 7/18 (2006.01); H05K 1/02 (2006.01); H05K 1/03 (2006.01);
U.S. Cl.
CPC ...
C01G 49/0072 (2013.01); C01G 49/00 (2013.01); C08K 3/22 (2013.01); C08K 7/18 (2013.01); C08L 101/00 (2013.01); C30B 29/22 (2013.01); H01F 1/36 (2013.01); H01F 1/37 (2013.01); H01F 1/375 (2013.01); C01P 2002/01 (2013.01); C01P 2002/70 (2013.01); C01P 2004/04 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C01P 2006/12 (2013.01); C01P 2006/42 (2013.01); C08K 2003/2265 (2013.01); C08K 2201/005 (2013.01); C08K 2201/006 (2013.01); C08K 2201/01 (2013.01); C08K 2201/011 (2013.01); H05K 1/028 (2013.01); H05K 1/0373 (2013.01); H05K 2201/083 (2013.01);
Abstract

An object of the present invention is to provide ferrite particles having a high saturation magnetisation, and being excellent in the dispersibility in a resin, a solvent or a resin composition, a resin composition including the ferrite particles, and a resin film composed of the resin composition. The ferrite particles are a single crystalline body having an average particle size of 1 to 2000 nm, and Mn-based ferrite particles having a spherical shape, and have a saturation magnetisation of 45 to 95 Am/kg. The resin composition includes the ferrite particles as a filler. The resin film is composed of the resin composition.

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