High-numerical-aperture effects in photoresist

Donis G. Flagello, Tom D. Milster

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Two-beam and three-beam vector interference in thin photoresist films is used to illustrate the striking differences between s-polarized and p-polarized high-numerical-aperture illumination. Both simulations and experiments are performed for several cases, including undyed photoresist on silicon, dyed photoresist on silicon, and the addition of an antireflective layer between the photoresist and the silicon. A 0.85 numerical-aperture system is examined. The major differences between s- and p-polarized illumination include elliptical versus rectangular features and lower contrast for p-polarized images.

Original languageEnglish (US)
Pages (from-to)8944-8951
Number of pages8
JournalApplied optics
Issue number34
StatePublished - Dec 1 1997

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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