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AssigneeHitachi, Ltd.
InventorsTadashi Fujieda, Kishio Hidaka, Shinzou Ikeda, Mitsuo Hayashibara, Noriyuki Taguchi
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The purpose of the present invention is to provide an easy-to-manufacture electromagnetic wave absorption material usable from submillimeter wave region to millimeter wave region with an excellent radio wave absorbing performance and a variety of usage thereof. The present invention is characterized by an electromagnetic wave absorption material comprised of a dispersions of at least one of the materials: a multi-layer hollow globule of carbon, a schungite carbon, and the schungite ore; mixed into a matter having a high electrical resistivity. The invention is further characterized by an electronic device, an optical transmission module, an optical reception module, a high frequency telecommunication equipment, and a stop-free automated tollgate system, wherein at least a part of their board, electronic element, and circuit wiring are covered with said electromagnetic wave absorption material.
An injection molded product comprising mixture of a hollow globule of carbon and one or more materials selected from the group consisting of rubber, insulating polymeric material, and inorganic insulating material, wherein said hollow globule of carbon is a multi-layer hollow globule and contains one selected from the group consisting of a carbon nano-tube, a metallic constituent, and water.
An injection molded product comprising mixture of a hollow globule of carbon and one or more materials selected from the group consisting of rubber, insulating polymeric material, and inorganic insulating material, wherein said hollow globule of carbon is a multi-layer hollow globule and contains any one material or a mixture of two or more materials selected from the group consisting of metals, metallic silicates, and metallic sulfides.
Dependencies are inferred from the claim text.