Creation manner of the basic plate for intaglio process which possesses the superfine belt, and creation manner of the basic plate for basic plate null

摘要

PPROBLEM TO BE SOLVED: To provide a method for making an intaglio printing original plate having an ultra-thin line and to provide an intaglio printing original plate by the method. PSOLUTION: The method includes: a first step of applying a positive photoresist on a printing primitive plate to a predetermined thickness; a second step of covering the photoresist of the primitive plate with a photomask having a predetermined pattern drawn thereon; a third step of irradiating the photoresist through the photomask with UV rays or electron beams under predetermined conditions to cure the irradiated part of the photoresist; and a fourth step of releasing the photomask and removing the non-irradiated portion of the photoresist under predetermined conditions. The method is characterized in that: the line width of the image drawn on the photomask is 10 to 30 m; the predetermined thickness of the photoresist is 1 to 30 m; and the irradiation period is 15 to 200 sec, which is 5 to 20 times in terms of a practical scale as the conventional standard irradiation period. PCOPYRIGHT: (C)2006,JPO&NCIPI