| abstract |
The present invention relates to a positive working photosensitive composition having an improved sensitivity due to the use of a sensitizer and having an excellent incandescent light safety. This composition comprises at least 1 molar % of a structural unit derived from at least one of monomers having the following general formulae: ##STR1## wherein: R 1 represents a hydrogen atom, an alkyl group or a substituted alkyl group, n R 2 represents a divalent alkylene group or a substituted divalent alkylene group, n R 3 , R 4 and R 5 may be the same as or different from each other and each represents an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group, n R 6 and R 7 may be the same as or different from each other and each represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group or a substituted aryl group, n Ar 1 represents a single bond or Ar 2 , and n Ar 2 represents a divalent arylene group or a substituted divalent arylene group. |