Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ELECTROMAGNETIC WAVE ABSORBING SHEET
Document Type and Number:
Japanese Patent JP3869147
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To provide an electromagnetic wave absorbing sheet at a low cost with excellent electromagnetic wave absorbing capability of 10 dB (70% attenuation) or over at a frequency band including frequencies of mainly 3 GHz (desirably 1 GHz) or over.
SOLUTION: In this electromagnetic wave absorbing sheet, cut metallic fibers 1 with an infinite cross section manufactured from a metallic wire with a wire cutting method, binder fibers 2 with a fiber binding function, or a non-binder fibers 3 that is a single phase or mixed composite phases including the binder fibers 2 are uniformly blended to form an unwoven cloth 4 whose fibers are bound by the binder fibers 2. An unwoven layer A is formed with a single layer or a plurality of layers of the unwoven cloth A. Then a metallic film 5 made of iron, aluminum, copper or their alloy having a radio wave reflecting performance is stretched over one side of the unwoven layer A.


Inventors:
Kazuhito Matsumura
Kenichi Yoshida
Iwai
Shuichi Nakata
Yoshizawa saint
Application Number:
JP8089399A
Publication Date:
January 17, 2007
Filing Date:
March 25, 1999
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Kanto Steel Wire Co., Ltd.
Japan Science and Technology Agency
Sumitomo Electric Industries, Ltd.
Kazuhito Matsumura
International Classes:
H01Q17/00; H05K9/00; (IPC1-7): H01Q17/00; H05K9/00
Domestic Patent References:
JP3019300A
JP4345089A
JP2232306A
JP11340674A
JP3169100A
JP1187896A
JP64082696A
JP59205239A
JP2000167963A
JP2000049490A
Attorney, Agent or Firm:
Toshio Hirayama