RADIO WAVE ABSORBER

Japanese Patent JPH09223890

A

To suppress deterioration of wave absorbing characteristic even in a short-wavelength frequency band and to make the title absorber be of a thin type by a method wherein poly (β-hydroxybutylate) or a copolymer thereof is made a dielectric layer and a resistive film is formed at least on one surface of this dielectric layer.

Poly (β-hydroxybutylate) or a copolymer thereof is made a dielectric layer 1 and a resistive film 2 is formed at least on one surface of this dielectric layer 1 by using a thin film prepared by ion plating, evaporation, sputtering or the like of a metal oxide, a metal nitride or a mixture thereof. Besides, the relative dielectric constant of the dielectric layer is improved by controlling the orientation by poling by an electric field. Moreover, a metal layer 3 is laminated on the surface of the dielectric layer whereon the resistive film 2 is not formed, and protective layers 4 and 5 of organic macromolecular films or sheets are formed on the surfaces of the resistive film 2 and the metal layer 3 respectively.

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HONMA YOKO
OSHIMA KENSHO
ENDO MITSUO

JP2669796A

August 26, 1997

February 14, 1996

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TOSOH CORP

H05K9/00; H01Q17/00; (IPC1-7): H05K9/00; H01Q17/00

JPH05114813A	1993-05-07
JPH0372473A	1991-03-27
JPH0784281A	1995-03-31
JPS5244542A	1977-04-07

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