New interferometric phase-shifting technique for sub-half-micron laser microlithography

Miklos Erdelyi; Chaitali Sengupta; Zsolt Bor; Joseph R. Cavallaro; Motoi Kido; Michael C. Smayling; Frank K. Tittel; William L. Wilson Jr.; Gabor Szabo

doi:10.1117/12.209308

26 May 1995 New interferometric phase-shifting technique for sub-half-micron laser microlithography

Miklos Erdelyi, Chaitali Sengupta, Zsolt Bor, Joseph R. Cavallaro, Motoi Kido, Michael C. Smayling, Frank K. Tittel, William L. Wilson Jr., Gabor Szabo

Author Affiliations +

Proceedings Volume 2440, Optical/Laser Microlithography VIII; (1995) https://doi.org/10.1117/12.209308
Event: SPIE's 1995 Symposium on Microlithography, 1995, Santa Clara, CA, United States

Abstract

This paper reports recent progress in achieving subhalf-micron feature sizes with UV laser illumination based on a novel interferometric phase shifting (IPS) technique. In the IPS arrangement, the intensity and amount of phase shift of the shifted beam can be controlled continuously and independently using the same mask. Consequently the method can be considered as a convenient general testbed for practical phase shifting concepts such as strong, weak and attenuated phase shifting. Recent measurements of the lithographic performance of a new concept are reported where phase shifting is combined with off-axis illumination. Experimental as well as simulation data are used to demonstrate this new method. A lithography simulator, Depict from Technology Modeling Associates, Inc. and a related Integrated CAD Framework which is being developed at Rice University was used to simulate and evaluate the performance of the IPS scheme.

Citation Download Citation

Miklos Erdelyi, Chaitali Sengupta, Zsolt Bor, Joseph R. Cavallaro, Motoi Kido, Michael C. Smayling, Frank K. Tittel, William L. Wilson Jr., and Gabor Szabo "New interferometric phase-shifting technique for sub-half-micron laser microlithography", Proc. SPIE 2440, Optical/Laser Microlithography VIII, (26 May 1995); https://doi.org/10.1117/12.209308

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