TITLE

Optimization of elastomeric phase masks for near-field photolithography

AUTHOR(S)
Li, Zhi-Yuan; Yin, Yadong; Xia, Younan
PUB. DATE
April 2001
SOURCE
Applied Physics Letters;4/23/2001, Vol. 78 Issue 17, p2431
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Rigorous electromagnetic theory has been used to optimize elastomeric phase masks for generating sub-100-nm parallel lines by means of near-field photolithography J. A. Rogers et al., Appl. Phys. Lett. 70, 2658 (1997). In the near-field region, the scattering effect is so strong that the scalar theory is no longer adequate: A bright line was found adjacent to the dark line previously predicted by the scalar theory, and the widths of both lines were found to be insensitive to the refractive index of the photoresist. The simulation results are in good agreement with experimental studies, which showed that the bright and dark lines could be used to generate trenches and lines in a positive-tone photoresist by controlling the exposure time. Our simulations also indicate that parallel lines as small as 50 nm can be generated by adjusting the parameters of the phase mask. © 2001 American Institute of Physics.
ACCESSION #
4711044

 

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