MEDIUM FOR FLUORESCENT READ-ONLY MULTILAYER OPTICAL INFORMATION CARRIER AND ITS MANUFACTURING METHOD

摘要

Fluorescent read-only media multilayered information carrier with separated fluorescent information carrier regions (511) against non-fluorescent background (512) in each layer (509) and the methods for making this. A photolithography process where the data carriers are formed from an originally non-fluorescent photosensitive layer (509) applied directly onto the photomask (501), followed by exposing the layer (509) through the photomask to produce fluorescent information pits (511) immediately in front of the transparent regions (504) of the photomask. Special photochemically stable transparent luminophors which control the spectral and luminescent properties of the data carrier layers (509) are generated in the photosensitive compositions.