Pcm. Tate et al., SIMPLE-MODEL OF THE LITHOGRAPHIC RESPONSE OF HATZAKIS CHEMICALLY-AMPLIFIED RESISTS, Microelectronic engineering, 27(1-4), 1995, pp. 409-412
A simple mathematical model has been employed to analyze quantitativel
y the crosslinking process in chemically amplified negative resists ba
sed on the combination of an epoxidized novolac resin and a photoacid
generator. Experimental evaluation of a number of resists employing di
fferent resins has shown that sensitivity and contrast increase concom
itantly. A resist formulation based on an experimental Dow resin desig
nated DQ9 has demonstrated exceptional contrast and a sensitivity well
matched to many e-beam systems.