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Proceedings Paper

Model-based OPC for sub-resolution assist feature enhanced layouts
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Paper Abstract

Sub-resolution assist features (SRAF) have been demonstrated to provide significant process window improvement when used in combination with off-axis illumination (OAI) and attenuated phase shifted mask enhanced lithography. While some through pitch linewidth variations can be reduced through the use of SRAF, the main goal is to improve common process window, leaving the task of linewidth control to conventional optical proximity correction (OPC). OPC in combination with SRAF is also required to address 2D patterning infidelities such as corner rounding and line end shortening, for which SRAF do not provide adequate correction. Finally, OPC will be used as a means of recovering process window that may be lost in layout situations that result in poor SRAF coverage. With an industry wide migration form rules-based OPC to iterative, model-based solutions, the integration of inherently rules based SRAF generation and model-based OPC has to be investigated.

Paper Details

Date Published: 12 July 2002
PDF: 7 pages
Proc. SPIE 4692, Design, Process Integration, and Characterization for Microelectronics, (12 July 2002); doi: 10.1117/12.475689
Show Author Affiliations
Pat LaCour, Mentor Graphics Corp. (United States)
Edwin A. Pell, Mentor Graphics Corp. (United States)
Yuri Granik, Mentor Graphics Corp. (United States)
Thuy Do, Mentor Graphics Corp. (United States)

Published in SPIE Proceedings Vol. 4692:
Design, Process Integration, and Characterization for Microelectronics
Alexander Starikov; Alexander Starikov; Kenneth W. Tobin Jr., Editor(s)

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