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US 6,143,674 AGranted
Electromagnetic radiation shield material and panel and methods of producing the same
AssigneeNisshinbo Industries, Inc.
InventorToshinori Marutsuka
Life of this patent
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AssigneeNisshinbo Industries, Inc.
InventorToshinori Marutsuka
Estimating the term…
An electromagnetic radiation shield material and an electromagnetic radiation shield panel suitable for placement in front of a display device to enable a viewer to see images displayed on the display device through the plate or panel while shielding the viewer from electromagnetic radiation and methods of producing the material and the panel are provided. The electromagnetic radiation shield material comprises at least a mesh-like metallic foil layer, a black resin portion of identical mesh-like pattern to the metallic foil layer and in aligned contact therewith, and a transparent base material. The electromagnetic radiation shield panel comprises a laminated composite of the electromagnetic radiation shield material and a display panel or a transparent base plate and is constituted so that the metallic foil layer is on the side facing the display device and the black resin portion is located outward of the metallic foil layer.
An electromagnetic radiation shield material having a shielding performance of not less than 40 dB in the range of 30 to 1000 MHz and an optical transmittance of not less than 65%, comprising at least a mesh copper foil layer, a black resin portion of identical mesh pattern to the copper foil layer and in aligned contact therewith, and a transparent base material.
A method of producing an electromagnetic radiation shield material comprising a step of providing in order on a transparent base material a black resin layer including a black pigment, a metallic foil layer, and a mesh resist layer, a step of etching metallic foil portions not protected by the resist layer to impart the metallic foil with a mesh pattern like the resist, and a step of extracting and removing black pigment from a portion of the black resin layer not in contact with the mesh metallic foil layer to form a black resin portion.
A method of producing an electromagnetic radiation shield material comprising a step of providing in order on a transparent base material an adhesive layer, a black resin layer including a black pigment, a metallic foil layer, and a mesh resist layer, a step of etching metallic foil portions not protected by the resist layer to impart the metallic foil with a mesh pattern like the resist, and a step of extracting and removing black pigment from a portion of the black resin layer not in contact with the mesh metallic foil layer to form a black resin portion.
Dependencies are inferred from the claim text.