Title:
ELECTROMAGNETIC WAVE ABSORBER
Document Type and Number:
WIPO Patent Application WO/2005/101941
Kind Code:
A1
Abstract:
An electromagnetic wave absorber comprising (a) soft ferrite having its surface treated with a silane compound having no functional group, (c) magnetite and (d) silicone, or comprising (a) soft ferrite having its surface treated with a silane compound having no functional group, (b) flat soft magnetic metal powder, (c) magnetite and (d) silicone, which electromagnetic wave absorber excels in electromagnetic wave absorption, heat conduction and flame resistance, exhibiting less temperature dependence, and which electromagnetic wave absorber is soft, excelling in adhesion strength and further excelling in high resistance high insulation properties and in energy conversion efficiency being stable in MHz to 10GHz broadband frequency. There is further provided a laminated electromagnetic wave absorber comprising the above electromagnetic wave absorber overlaid with a reflection layer of conductor, which laminated electromagnetic wave absorber can be closely stuck onto an unwanted electromagnetic wave emission source such as a high-speed operating device, having such an adhesive strength that even when stuck to a horizontal glassy-surface ceiling face of resin-made cage, would not fall.
Inventors:
KOBAYASHI TATSUYA (JP)
Application Number:
PCT/JP2004/015488
Publication Date:
October 27, 2005
Filing Date:
October 20, 2004
Export Citation:
Assignee:
GELTEC CO LTD (JP)
KOBAYASHI TATSUYA (JP)
KOBAYASHI TATSUYA (JP)
International Classes:
C01G49/00; C08K9/06; C08L83/04; C09C1/22; H01F1/34; H01F1/36; H01F1/37; H01Q17/00; H05K9/00; H01F10/00; H01F10/20; H05K1/02; (IPC1-7): H05K9/00; C01G49/00; C08K9/06; C08L83/04; H01F1/34; H01F1/36; H01Q17/00
Foreign References:
| EP1372162A1 | 2003-12-17 | |||
| JP2002296940A | 2002-10-09 | |||
| JP2002072668A | 2002-03-12 | |||
| JP2003327831A | 2003-11-19 | |||
| JP2004022685A | 2004-01-22 | |||
| US6090478A | 2000-07-18 | |||
| EP0819724A1 | 1998-01-21 | |||
| JPS6456195U | 1989-04-07 | |||
| JP2002176284A | 2002-06-21 | |||
| JP2003283181A | 2003-10-03 | |||
| JP2002371138A | 2002-12-26 | |||
| JP2003332784A | 2003-11-21 | |||
| JP2000244173A | 2000-09-08 |
Attorney, Agent or Firm:
Kawabi, Kenji (6th floor 9-7, Higashi-ikebukuro 3-chom, Toshima-ku Tokyo 13, JP)
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