Electromagnetic Wave Shielding Sheet and Process For Producing the Same
AssigneeDai Nippon Printing Co., Ltd.
InventorsNobuo Naito, Fumihiro Arakawa, Tadahiro Masaki
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Abstract
An electromagnetic wave shielding sheet 1 comprises a transparent substrate 11, and line parts 107 that define openings 105, provided on the transparent substrate 11. The line parts 107 have a metal mesh layer 21, and a blackening layer 25A formed on the surface of the metal layer 21, on the side of the transparent substrate 11. Matted layers 31 are formed on the side faces of the line parts 107, and an anticorrosive layer 23A is provided between the blackening layer 25A and the transparent substrate 11.
Claims7
An electromagnetic wave shielding sheet comprising:
- a transparent substrate, and
- line parts that define openings, formed on one surface of the transparent substrate,
- the line parts having a metal mesh layer and a blackening layer formed at least on one surface of the metal layer,
- matted layers being formed so that, of the side faces of the line parts, at least the side faces of the metal layer are covered with the matted layers.
A process for producing an electromagnetic wave shielding sheet comprising a transparent substrate, and line parts that define openings, formed on one surface of the transparent substrate, the line parts having a metal mesh layer and a blackening layer formed at least on one surface of the metal layer, matted layers being formed so that, of the side faces of the line parts, at least the side faces of the metal layer are covered with the matted layers, the process comprising the steps of:
- preparing a metal layer,
- forming a blackening layer at least on one surface of the metal layer,
- laminating a transparent substrate to the metal layer and the blackening layer by an adhesive with the blackening layer facing to the transparent substrate, thereby obtaining a laminate,
- photolithographically patterning the blackening layer and the metal layer in the laminate, into a mesh, to form line parts defining openings that have the metal layer and the blackening layer and,
- forming, by matting treatment, matted layers at least on the side faces of the metal layer in the line parts.
Dependencies are inferred from the claim text.