Mitsubishi Gas Chemical Company, Inc.

Noboru Otani

Hisamatsu Nakano

Yoshiyuki Masuda

The problem of the present invention is to offer a wave absorber that has reflection attenuation capability sufficient to enable prevention of communication disturbances due to reflection and the like of EM waves, that enables greater thinness and lighter weight, and that has wide-band attenuation properties, as well as a manufacturing method of the wave absorber. The wave absorber of the present invention has a structure which sequentially laminates a grid-like conductor layer composed of an electric conductor, a first dielectric layer, a high-resistance conductor layer having a surface resistivity within a prescribed range, a second dielectric layer, and a pattern layer having multiple patterns composed of an electric conductor, wherein each pattern in said pattern layer differs in either or both of size and form relative to another adjacent pattern.

Wave absorber and manufacturing method of wave absorber

A wave absorber of the present invention includes a sequentially laminated structure including an conductor layer () made of a conductive material; a first dielectric layer (polycarbonate substrate () and bismaleimide-triazine substrate ()) made of one layer or a multilayer of a dielectric material; and a patterned layer () including a plurality of a pattern made of the conductive material, wherein the conductor layer, the first dielectric layer, and the patterned layer are laminated sequentially, and each pattern in the patterned layer () is different from other adjacent patterns with respect to at least one of size and shape. Therefore, the wave absorber has sufficient reflection-attenuating capability to prevent communication failure caused by a reflection of a radio wave and so on, can be thin-sized and reduced in weight, and has a wide-band attenuation property.

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Tokyo, Japan

Noboru Otani