Manufacturing method of stripe filter
AssigneeDainippon Screen Mfg. Co., Ltd.
InventorsShimizu Hirofumi, Yamano Akira, Ikeuchi Shinzo
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Abstract
A method of manufacturing a stripe filter for optical usages, the method being based on a partially hardening of a liquid colored composition spread on a transparent base plate together with a partially eliminating of portions remaining soluble after the hardening operation, wherein a series of these operations is repeated with said compositions respectively assuming different colors.
Claims10
A method of manufacturing a stripe filter having a transparent base plate and fine stripes formed thereon and assuming different colors, said method comprising a repeated series of operations including (a) applying onto and drying on the base plate a liquid colored composition which contains at least a dyestuff assuming a predetermined color, a coating material, a dissolution accelerator for the dyestuff and a photo-sensitive hardener therefor, (b) exposing predetermined portions of said composition on the plate by means of a mask having a predetermined pattern of transmitting zones in such a degree as to harden said portions, thereby forming a group of unsoluble stripes assuming said predetermined color, (c) eliminating other portions remaining unhardened by means of a solvent for said coating material, thereby said unhardened portions being dissolved into said solvent, and repeating the series of operations for required times, each time using a different liquid composition assuming a different color being used and the number of times being determined in accordance with the number of said groups.
Dependencies are inferred from the claim text.