Properties of Ammonium‐Dichromated Casein and Its Application to Color Filter for High‐Resolution Solid‐State Imagers

Abstract

The photosensitivity of ammonium dichromated casein is higher than low molecular weight gelatin and increases with the increase of the content of ammonium dichromate as the photosensitive reagent. The ammonium dichromated casein can provide finer pattern profile than the gelatin. Its dyeing property decreases with the increase of the Cr(III) concentration in the cross-linked ammonium dichromated casein film exposed by UV light and increases with the increase of dyeing temperature. The dyeing property of casein is not as good as gelatin for the same Cr(III) concentration and the same temperature. The casein is more suitable for high definition color filters than the gelatin because of its fine, sharp resolution.Water soluble polymers play an important role in several industries, such as electronics, printing, and photography. Cox et al.(1) reported the sensitivity of albumin, glue, and