Patent ID: 7229739

Claim:
A positive working infrared sensitive composition prepared by combining at least the following materials: a hydroxy substituted polymer; a diphenylcarbinol solubility suppressor having the structure wherein R1 is selected from H, alkyl and acyclic, R2 and R3 are each independently selected from H, NO 2 , alkyl, acyclic, alkoxy, —O-acyclic, amino, alkylamino, —N(H)acyclic, dialkylamino, —N(acyclic) 2 , aryl, arylamino, diarylamino, a carbon ring structure, a carbocyclic ring, a heterocyclic ring and a heteroaromatic ring; and an infrared sensitive chemical having an absorption wavelength maximum in the range of about 800 nm to about 1100 nm; wherein the composition before exposure to radiation having a wavelength in the range of about 800 nm to about 1100 nm has a first solubility in aqueous alkaline solutions and the composition after exposure to radiation having a wavelength in the range of about 800 nm to about 1100 nm has a second solubility in aqueous alkaline solutions that is greater than the first solubility.