Parkhurst, Wendel & Burr, L.L.P.
Chromium blanks for forming black matrix-screen and color filter for liquid crystal display
 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. 
Dai Nippon Printing Co., Ltd.
G G
G02F G03F
inventional inventional
Masanobu Takashi Yukio Junji Masahiro Hiroyuki
Fujita Nishimoto Iimura Fujikawa Takahashi Matsui