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.
KAGAWA MASANOBU
TAWARA KAZUTOKI
KAWAGUCHI TOSHIYUKI
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Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
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