Title:
ELECTROMAGNETIC WAVE ABSORPTION MATERIAL AND VARIOUS ITEMS USING THE SAME
Document Type and Number:
Japanese Patent JP3922039
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic wave absorption material having superior electromagnetic wave absorption characteristics which can be easily manufactured and used in regions from submillimeter to millimeter waves, and to provide various uses applying the same.
SOLUTION: The electromagnetic wave absorption material comprises a multilayer hollow spherule of carbon, shungite carbon, and at least one kind of shungite crystal which are dispersed into a material of high electric resistivity. At least part of a substrate, an electronic device and wiring circuit is covered with the electromagnetic wave absorption material. Further, the electromagnetic wave absorption material is applied to an optical transmission or reception module, a high-frequency transmission apparatus and a non-stop automatic toll collection system.
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Inventors:
Tadashi Fujieda
Takashi Hidaka
Shinzo Ikeda
Mitsuo Hayashibara
Noriyuki Taguchi
Takashi Hidaka
Shinzo Ikeda
Mitsuo Hayashibara
Noriyuki Taguchi
Application Number:
JP2002038237A
Publication Date:
May 30, 2007
Filing Date:
February 15, 2002
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H05K9/00; H01Q17/00; H05K1/02; H05K3/28; (IPC1-7): H05K9/00; H05K1/02
Domestic Patent References:
| JP11290435A | ||||
| JP6132691A | ||||
| JP2001358493A | ||||
| JP2001267782A | ||||
| JP2002038033A | ||||
| JP2000026760A |
Other References:
MASTEROV他,Microwave Absorption in Fullerene-Containing Shungites,Molecular Materials,Gordon and Breach Science Publishers S.A.,1994年 7月,Vol.4,No.1/3,p.213-216
Attorney, Agent or Firm:
Yukihiko Takada