Blank plates for forming multi-color fluorescent planes and methods for

Abstract

According to the present blank plate and method for forming multi-color fluorescent planes, a photosensitive layer is formed on one side of a substrate and exposed to light from the other side thereof. The step of exposure to light is carried out with a combination of a full-color pattern including light-transmitting segments in coincidence with every color pattern with a single-color mask including light-transmitting segments corresponding to each color pattern. After the full-color pattern has been formed on the substrate, the photosensitive layer containing a fluorophore is formed and, then, exposed to light from the side of the substrate opposite to the side having the photosensitive layer formed thereon through the single-color mask attached in place, followed by development. The above steps are repeated to form a multi-color fluorescent plane having the desired pattern. According to the present invention, since the arrangement of every color is established by the full-color mask, deviations of the total pitch and each color are determined exclusively depending upon the accuracy of the full-color mask. Hence, the allowable range of deviations of position alignment of the substrate with the single-color mask is so widened that such deviations of position alignment can be absorbed to make it easy to form multi-color fluorescent planes of extremely high accuracy.