Patent ID: 7875408

Claim:
A process for enhancing the contrast of an aerial image in an optical lithography surface comprising operatively associating said surface with a bleachable material and exposing said surface to light having a wavelength of 193 nm, where said bleachable material comprises: (a) cyclic compounds having the following photoactive moieties that effect or change optical absorption or bleaching: where Y represents organo or substituted organo moieties, R 3 , R 4 comprise hydrogen, or 1 to about 10 carbon atom alkyl, fluoroalkyl, alicyclic, aromatic, carbonyl, carboxyl and other heteroatom-containing groups and combinations thereof; R 5 , R 6 , R 7 , R 8 , F, G comprise independently hydrogen, or 1 to about 10 carbon atom alkyl, fluoroalkyl, alicyclic, aromatic, alkoxyl, carbonyl, carboxyl, halogen and other heteroatom-containing groups comprising cyano or nitro groups and combinations thereof; R 9 , R 10 , R 11 comprise hydrogen, or 1 to about 10 carbon atom alkyl, fluoroalkyl, alicyclic and aromatic groups and various combinations thereof, R 14 represents any kind of tethering group that physically connects the two aromatic rings together; Ar 1 and Ar 2 comprise 6 to about 10 carbon atom aromatic substituents including substituted or unsubstituted phenyl or thienyl arranged in cis or trans geometry around the central double bond; R 5 and R 6 , R 7 and R 8 also comprising a cyclic structure annulated to the base structure depicted in the corresponding formula; structures I, II, and III comprise basic skeletons and can be substituted in any available positions with any one or combinations of R 3 to R 14 multiple substituents; (b) organo silicon compounds (c) condensation products of aromatic hydroxyl compounds and a carbonyl compound; and (d) compounds with pendant photobleachable moieties comprising styrene and phenolic acrylates.