A methodology is presented using thermal analysis to aid lithographic
process development and/or photoresist evaluation. The temperature ran
ges of the reactions occurring in the photoresist film during baking c
ycles, and the apparent glass transition temperatures (T-g) of the fil
ms are determined, and used for prebake and post-exposure bake optimis
ation. The methodology is applied for several commercial photoresists,
namely UVIII, XP 90166*, EPR*, and AZ 5214*, for which optimum bakin
g temperature ranges are determined.