COMPOSITE MAGNETIC ELEMENT, ELECTROMAGNETIC WAVE ABSORBING SHEET, PRODUCTION METHOD FOR SHEET−FORM ARTICLE, PRODUCTION METHOD FOR ELECTROMAGNETIC WAVE ABSORBING SHEET

WIPO Patent Application WO/2003/041474

A1

An electromagnetic wave absorbing sheet having a high−frequency and excellent transmittance, and a production method therefor. An electromagnetic wave absorbing sheet comprising insulation layers on the opposite surfaces of a magnetic layer. The magnetic layer is formed by plastically deforming and densely depositing many elements of magnetic powder. Each element of magnetic powder consists of a composite magnetic element formed of a soft magnetic metal phase consisting of flat soft magnetic metal powder and an insulation phase consisting of an insulation film formed on the surface of the soft magnetic metal phase. A conductor layer may be provided on one of the insulation layers located on the opposite sides of the magnetic layer, and the conductor layer may be covered with an insulation layer.

JP4608600

Electromagnetic steel sheet with insulating film with excellent thermal conductivity and its manufacturing method

WAKAYAMA KATSUHIKO (JP)
KARATSU MASAHIRO (JP)
CHOU TSUTOMU (JP)
HASHIMOTO YASUO (JP)

PCT/JP2002/011650

May 15, 2003

November 08, 2002

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TDK CORP (JP)
WAKAYAMA KATSUHIKO (JP)
KARATSU MASAHIRO (JP)
CHOU TSUTOMU (JP)
HASHIMOTO YASUO (JP)

H01F1/18; H01F1/24; H01F1/26; H01F41/02; H05K9/00; (IPC1-7): H05K9/00; H01F1/00; H01F1/24

JP2001237591A	2001-08-31
JP2001244684A	2001-09-07
JPH1140981A	1999-02-12
JP2000332484A	2000-11-30
JP2000243615A	2000-09-08
JPH1145804A	1999-02-16
JP2002198684A	2002-07-12
JP2002164689A	2002-06-07
JP2001308584A	2001-11-02
JPH1092623A	1998-04-10

See also references of EP 1453368A4

Oba, Mitsuru (4-3 Iwamotocho 1-chome Chiyoda-ku, Tokyo, JP)

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