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AssigneeHitachi Powdered Metals Co., Ltd.
InventorsShinichi Tachizono, Hironobu Chiyoda, Toshiya Yamamoto, Shigeo Takashima, Masayoshi Tsuboi, Hiroshi Yamane, Shigeo Kotera, Minoru Aoki
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Disclosed are a shading film formed on a transparent substrate for forming a color filter, and a shading coating for forming the shading film. The shading film is made up of particles of a material with a layered lattice structure. The maximum diameter of the particles is 3 .mu.m or less, with the average diameter in the 0.05 .mu.m to 0.08 .mu.m range, and 40 to 95 wt % of the particles have a diameter of 0.1 .mu.m or less. The average aspect ratio of the particles is 10/1 or greater. The shading coating contains: a particulate material with a layered lattice structure and satisfying the characteristics relating to the particle size described above; and a dispersion medium for dispersing the particulate material. Water is used as the dispersion medium.
A shading film formed on a transparent substrate to form a color filter, comprising particles of a material with a layered lattice structure and having an optical density of not smaller than 1.8, in which the maximum diameter of said particles is not more than 3 .mu.m, an average diameter of the particles is within the range of 0.05 .mu.m to 0.08 .mu.m, and 40 wt % to 95 wt % of the particles have a diameter of not more than 0.1 .mu.m, and the average aspect ratio of the particles is not smaller than 10/1.
A shading coating comprising:
A method of forming a shading film, comprising the steps of:
A shading film for a color filter, comprising particles of a material with a layered lattice structure and having an optical density of not smaller than 1.8, in which the maximum diameter of the particles is not more than 3 .mu.m, average diameter of the particles is within the range of 0.05 .mu.M to 0.08 .mu.m, and 40 wt % to 95 wt % of the particles have a diameter of not more than 0.1 .mu.m, and the average aspect ratio of the particles is not smaller than 10/1.
A shading film for intercepting light radiation, comprising particles of a material with a layered lattice structure and having an optical density of not smaller than 1.8, in which the maximum diameter of said particles is not more than 3 .mu.m, an average diameter of said particles is within the range of 0.05 .mu.m to 0.08 .mu.m, and 40 wt % to 95 wt % of the particles have a diameter of not more than 0.1 .mu.m, and the average aspect ratio of the particles is not smaller than 10/1.
Dependencies are inferred from the claim text.