PURPOSE: To improve the developing property in an alkaline developing solution by including diazo resin having at least one specific repeating unit in the photosensitive layer.
CONSTITUTION: A photosensitive composition includes diazo resin having at least one repeating unit as expressed by the formula. In the formula, R1 denotes a hydrogen atom, alkyl group, alkoxyl group, hydroxyl group, carboxyester group, or carboxyl group that may have a substituent, and R2 denotes a hydroxyl group or a group having at least one alcoholic or phenolic hydroxyl group, and R3, R4 denote a hydrogen atom, alkyl group, or alkoxyl group respectively, and X denotes -NH-, -O-, or -S-, and Y- denotes an anion. As the R2, that which includes an OH group is preferable. By providing an OH group in the base material of diazo resin, the hydrophilic property of the resin can be enhanced, and the developing property can be improved.
NAKAI HIDEYUKI
KAMIMURA JIRO
MURATA MASAHISA
MITSUBISHI CHEM IND