Imagewise exposing and heating a microimaging film containing an organo diselenide, a tertiary phosphine or phosphite and an organic peroxide

Abstract

Disclosed is an imaging method which comprises: A. providing a film of an organic polymer as matrix material having uniformly dispersed therein: I. a photochemically reactive organo diselenide characterized by the formula: R.sub.1 --Se--Se--R.sub.2 wherein R.sub.1 and R.sub.2 are aralkyl or alkyl hydrocarbon moieties; Ii. a tertiary phosphine or phosphite characterized by the formula: ##STR1## wherein each n is 0 in the case of phosphine and 1 in the case of a phosphite and R.sub.3, R.sub.4 and R.sub.5 are independently substituted or unsubstituted aryl hydrocarbon moieties; and Iii. an organic peroxide characterized by the formula: ##STR2## wherein R.sub.6 and R.sub.7 are aryl or substituted aryl; B. EXPOSING THE FILM IN AN IMAGEWISE MANNER TO ULTRAVIOLET RADIATION TO FORM AN IMAGE THEREIN; AND C. heating the exposed film to a temperature of at least about 100.degree. C for a time sufficient to enhance the image contrast.

Dependencies are inferred from the claim text.