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Patent Searching and Data


Title:
RADIO WAVE ABSORBER
Document Type and Number:
Japanese Patent JP2008124154
Kind Code:
A
Abstract:

To provide a durable radio wave absorber where the surface resistivity of a resistive film is nearly fixed for a long term, and initially satisfactory radio wave absorption performance can be maintained for a long term.

The radio wave absorber A is provided with a resistive film 2 on one side of a dielectric layer 1 and a radio wave reflector 3 on the opposite side of the dielectric layer 1, and gas barrier films 5 and 5 are stacked on both surfaces of the resistive film 2. Thus, the invasion and contact of moisture (open air containing water content) into/with the resistive film 2 can be blocked with the gas barrier films 5 and 5, and an influence of heat or light on the resistive film 2 can be also reduced, so as to keep the surface resistivity of the resistive film 2 nearly constant, prevent the degradation of radio wave absorbing performance due to a change in surface resistivity, and maintain initially satisfactory radio wave absorption performance for a long term. As a result, the durability and reliability can be extensively improved.


Inventors:
TAKADA TOMONORI
TAKAYAMA TAKASHI
ITO HIDEMI
Application Number:
JP2006304531A
Publication Date:
May 29, 2008
Filing Date:
November 09, 2006
Export Citation:
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Assignee:
TAKIRON CO
International Classes:
H05K9/00; B32B5/02; B32B7/02; B32B9/00; B32B27/00; C08J5/18
Attorney, Agent or Firm:
河▲崎▼ 眞樹