PROCESS OF MANUFACTURE OF MULTICOLORED OPTICAL FILTER FOR LIQUID-CRYSTAL DEVICE Russian patent published in 1995 - IPC

FIELD: optoelectronics. SUBSTANCE: process includes application of layer of negative photoresist based on casein of following composition, per cent by mass: casein 8.0-15.0, caustic potash 0.5-1.0; ammonium bichromate 0.16-2.0; water 82.0-90.0 on transparent backing with formed transparent electrodes, thermal treatment, exposure, development of image in water, its coloring in aqueous solution of pigment, hardening, application of protective layer of optically transparent polymer material. Then these operations are repeated for production of each color of filter. EFFECT: increased stability of colors of optical filter. 3 dwg