Accession Number : ADA294682
Title : Photogenerated Base in Polymer Curing and Imaging: The Use of alpha-Keto Carbamates as Novel Photoprecursors of Amines.
Descriptive Note : Technical rept.,
Corporate Author : CORNELL UNIV ITHACA NY BAKER LAB
Personal Author(s) : Wynne, Kenneth J. ; Frechet, Jean M. ; Cameron, James F. ; Wilson, C. G.
PDF Url : ADA294682
Report Date : 01 JUN 1995
Pagination or Media Count : 44
Abstract : Several newly developed alpha-keto carbamates are useful as photoprecursors of amines. These photogenerated catalysts that are designed primarily for use in chemically amplified resist materials can also be used for the curing of polymers containing base crosslinkable reactive groups. The new alpha-keto carbamates can undergo light triggered photocleavage both in the solid-state and in solution to give free amines. The photoactive benzoinyloxycarbonyl groups of these compounds are active with ultraviolet radiation below 400nm. The influence of various steric and electronic effects on the photoliberation of free amines from alpha-keto carbamates has been studied and the effect of structural modification of the aryl rings was used to probe the electronic factors of the photocyclization. The great potential of these photoactive carbamates as organic sources of photogenerated amines was demonstrated using both classical spectroscopic techniques (UV, IR and NMR) and GC-MS analysis of the photolysis products. In all cases the photocleavage reaction is near quantitative and the quantum yields have been measured over a range of wavelengths from 250-370 nm. jg
Descriptors : *POLYMERS, *AMINES, *IMAGES, *CURING, *CARBAMATES, FREQUENCY, ELECTRONICS, SOURCES, ULTRAVIOLET RADIATION, SPECTROSCOPY, PHOTOCHEMICAL REACTIONS, PHOTOLYSIS, MODIFICATION, STRUCTURAL PROPERTIES, PRECURSORS, COMPOSITE MATERIALS, LIGHT, REACTIVITIES, LITHOGRAPHY, CROSSLINKING(CHEMISTRY), ORGANIC MATERIALS, QUANTUM EFFICIENCY, ARYL RADICALS, AMPLIFICATION, RINGS, SOLID STATE CHEMISTRY.
Subject Categories : Polymer Chemistry
Radiation and Nuclear Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE