Open Access
21 December 2015 Enhanced lithographic resolution using longitudinal polarization state of light
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Abstract
Laser direct-writing is an important technique for the fabrication of complex patterns. There is a continuous need for structures with increasingly small features, i.e., enhanced resolution. Focused radially polarized light is known to exhibit a narrow longitudinal polarization component. Here, a proof-of-concept is shown of enhanced resolution through polarization-selectivity by the selective recording of the longitudinal polarization component in a polarization-selective homeotropic and smectic B photoresist. The full-width-at-half-maximum (FWHM) of the fabricated spots in the polarization-selective resist is up to 56% smaller compared to the FWHM of the same spot in a photoresist that is not polarization-selective, which supports simulations that predict a theoretical maximum reduction of 62%.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
My-Phung Van, Katsiaryna Ushakova, Cees W. M. Bastiaansen, Silvania F. Pereira, H. Paul Urbach, and Dirk J. Broer "Enhanced lithographic resolution using longitudinal polarization state of light," Journal of Micro/Nanolithography, MEMS, and MOEMS 14(4), 043509 (21 December 2015). https://doi.org/10.1117/1.JMM.14.4.043509
Published: 21 December 2015
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CITATIONS
Cited by 3 scholarly publications.
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KEYWORDS
Photoresist materials

Polarization

Resolution enhancement technologies

Lithography

Liquid crystals

Atomic force microscopy

Beam splitters

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