Chromium blanks for forming black matrix-screen and color filter

Details Chromium blanks for forming black matrix-screen and color filter Chromium blanks for forming black matrix-screen and color filter

1995-12-21

1997-01-07

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

430 5, 349105, G02F 11335, G03F 100

Patent

active

055923178

ABSTRACT:
A chromium blank for forming a black matrix-screen to be used as a color filter for a liquid crystal display is formed by forming at least a first antireflection film, a second antireflection film and a screening film sequentially in that order on one major surface of a transparent substrate. Each of the first and the second antireflection film is a semitransparent film formed of a chromium compound or a chromium mixture, containing chromium as a principal component, and the screening film is formed of chromium, a chromium compound containing chromium as a principal component. The transparent substrate, the first antireflection film, the second antireflection film and the screening film meet an inequality: n.sub.s <n.sub.1 <n.sub.2 <n.sub.3, where n.sub.s is the refractive index of the transparent substrate, n.sub.1 is the real part of the complex index of refraction of the first antireflection film, n.sub.2 is the real part of the complex index of refraction of the second antireflection film, and n.sub.3 is the real part of the complex index of refraction of the screening film, in the substantially entire visible wavelength range.

REFERENCES:
patent: 4720442 (1988-01-01), Shinkai et al.
patent: 5279911 (1994-01-01), Kamon et al.
patent: 5415953 (1995-05-01), Alpay et al.
patent: 5514499 (1996-05-01), Iwamatsu et al.

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