Title:
ANTIREFLECTION FILM
Document Type and Number:
Japanese Patent JP3490214
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an antireflection film having excellent durability and stress releasing property by forming inorg. compd. layers having different refractive indices in such a manner that the refractive index in the thickness direction is not uniform for the optical thickness (the product of the refractive index and the geometric film thickness).
SOLUTION: A hard coating layer 3, an antireflection layer 4 and a water- repelling layer 5 are successively formed on a base body 2. The antireflection layer 4 consists of high refractive index material layers 41 and low refractive index material layers 42. The refractive index n in each material layer 41, 42 is made not uniform, but the product of the refractive index n and the geometric film thickness d (n×d) is made const. For example, a UV-curing type acryl resin is applied by a microgravure coating method on a triacetyl cellulose film as the substrate 2 to form the hard coating layer 3 of 5μm thickness. Then a titanium oxide as the high refractive index layers 41 and silicon dioxide as the low refractive index layers 42 are alternately deposited on the hard coating layer 3 to form the antireflection layer 4. Then a perfluorosilane is applied by CVD method to form the water-repellent layer 5.
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Inventors:
Haruo Uyama
Takahiro Harada
Takahiro Harada
Application Number:
JP8951696A
Publication Date:
January 26, 2004
Filing Date:
April 11, 1996
Export Citation:
Assignee:
Toppan Printing Co., Ltd.
International Classes:
G02B1/11; B32B7/02; B32B9/00; G02B1/115; G02B1/14; (IPC1-7): G02B1/11; B32B7/02; B32B9/00
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