Patent ID: 6808861
Filing Date: 2004-10-26
Classification: B41C,B41M,B41N,Y10S

Abstract:
A positive photosensitive composition, comprising(a) a photo-thermal conversion material; (b) a high molecular compound; and (c) a solubility-suppressing agent; wherein said high molecular compound (b) has a solubility in an aqueous alkali developer which changes as a result of a change, other than a chemical change, in said high molecular compound (b); wherein said solubility in an aqueous alkali developer of said composition is greater in a photo-thermally exposed portion than a non-exposed portion; wherein said solubility-suppressing agent (c) is capable of lowering the dissolution rate of a blend of component (a) and component (b) in said aqueous alkali developer; wherein said solubility suppressing agent (c) is a compound having substantially no photosensitivity to ultraviolet light; wherein said composition is substantially in the absence of an o-quinone diazide group-containing compound; and wherein said high molecular compound (b) comprises a novolak resin, a polyvinyl phenol resin or a mixture thereof.