Accession Number : ADA183279

Title :   Choosing Polymer Solvents for Microlithography.

Descriptive Note : Technical rept.,

Corporate Author : CORNELL UNIV ITHACA SCHOOL OF CHEMICAL ENGINEERING

Personal Author(s) : Rosenthal,D ; Groele,R J ; Rodriguez,F ; Namaste,Y M ; Obendorf,S K

PDF Url : ADA183279

Report Date : 24 Jul 1987

Pagination or Media Count : 27

Abstract : Criteria for choosing solvents for coatings and dissolution processes in microlithography include: a) Thermodynamic interaction measured by viscosity level, intrinsic viscosity, or swelling, b) Dynamic interaction (transport) characterized by a diffusivity or some other rate process, such as rate of dissolution, c) Volatility, control of removal, since the solvent is not a part of the final product, d) Safety (flammability and health hazards), and e) Cost. Solvents based on ethylene oxide derivatives which contain both ether and ester linkages have been very useful in lithographic applications. However, health hazards such as fetatoxicity may be involved with such materials. In this work we found that PMAC (1-methoxy-2 propanol, acetate) and EEP (ethyl 3-ethoxy propionate) are suitable replacements for two popular ethylene oxide-based solvents, namely, MCA (2-methoxyethyl acetate) and ECA (2-ethoxyethyl acetate).

Descriptors :   *LITHOGRAPHY, *POLYMERS, *SOLVENTS, COATINGS, COSTS, ESTERS, LINKAGES, FLAMMABILITY, CONTROL, REMOVAL, DYNAMICS, INTERACTIONS, ETHYLENE OXIDE, ETHYLENES, HAZARDS, HEALTH, MICROSCOPY, PHOTOLITHOGRAPHY, RATES, THERMODYNAMICS, DISSOLVING, EXPANSION, DIFFUSION, POLYMETHYL METHACRYLATE, VISCOSITY, VOLATILITY

Subject Categories : Printing and Graphic Arts

Distribution Statement : APPROVED FOR PUBLIC RELEASE