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28 May 2004 Determination of resist parameters using the extended Nijboer-Zernike theory
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This study presents an experimental method to determine the resist parameters that are at the origin of a general blurring of the projected aerial image. The resist model includes the effects of diffusion in the horizontal plane and a second cause for image blur that originates from a stochastic variation of the focus parameter. The used mathematical framework is the so-called Extended Nijboer-Zernike (ENZ) theory. The experimental procedure to extract the model parameters is demonstrated for several 193 nm resists under various conditions of post exposure baking temperature and baking time. The advantage of our approach is a clear separation between the optical parameters, such as feature size, projection lens aberrations and the illuminator setting on the one hand and process parameters introducing blur on the other.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter Dirksen, Joseph Braat, Augustus J. E. M. Janssen, Ad Leeuwestein, Hans Kwinten, and David Van Steenwinckel "Determination of resist parameters using the extended Nijboer-Zernike theory", Proc. SPIE 5377, Optical Microlithography XVII, (28 May 2004);

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