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Title:
ELECTROMAGNETIC WAVE NOISE SUPPRESSION SHEET, AND ITS MANUFACTURING METHOD AND USAGE
Document Type and Number:
Japanese Patent JP2006093416
Kind Code:
A
Abstract:

To provide an electromagnetic wave noise suppression sheet which has two electromagnetic wave noise suppressing functions including a conduction noise suppressing function and a radiation noise suppressing function and can be made thin and has a high mechanical strength and has a superior flexibility, and also to provide its manufacturing method and usage.

The electromagnetic wave noise suppression sheet 1 comprises a base substance 5 containing a binder 2 and electromagnetic wave absorbing particles 3 having an aspect ratio of 5 or less, and a composite layer 6 which is an integrated body of part of the binder 2 and a magnetic substance. The manufacturing method of the electromagnetic wave noise suppression sheet 1 comprises a base substance manufacturing process wherein an electromagnetic wave absorbing composition containing the binder 2 and the electromagnetic wave absorbing particles 3 having an aspect ratio of 5 or less is formed, and then a skin layer 4 wherein no electromagnetic wave absorbing particles exist is formed on the electromagnetic wave absorbing composition to fabricate the base substance 5; and an evaporation process wherein a magnetic substance is dispersed into the skin layer 4 of the base substance 5 by a physical evaporation method to form the composite layer 6 on the front surface of the base substance5.


Inventors:
GONDA TAKASHI
KAGAWA MASANOBU
TAWARA KAZUTOKI
KAWAGUCHI TOSHIYUKI
Application Number:
JP2004277171A
Publication Date:
April 06, 2006
Filing Date:
September 24, 2004
Export Citation:
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Assignee:
SHINETSU POLYMER CO
International Classes:
H05K9/00; B32B27/18; H01Q17/00
Domestic Patent References:
JP2004273751A2004-09-30
JP2004335770A2004-11-25
JP2000077891A2000-03-14
JP2002198684A2002-07-12
JPH05226873A1993-09-03
JP2003060383A2003-02-28
Foreign References:
WO2003081973A12003-10-02
WO2004045265A12004-05-27
WO2003021610A12003-03-13
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama