Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Screen other than for cathode-ray tube
Patent
1989-03-28
1991-04-23
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Screen other than for cathode-ray tube
430 4, 430 20, 430321, 430394, G03F 900
Patent
active
050099728
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.
REFERENCES:
patent: 4828947 (1989-05-01), Sato et al.
Higuchi Naoshige
Miyake Toru
Bowers Jr. Charles L.
Dai Nippon Printing Co. Ltd.
Neville Thomas R.
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