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Proceedings Paper

Simple method for restricting OPC model minimum spacing and width for a no-failure imaging solution
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Paper Abstract

Optical proximity correction (OPC) procedure for modifying designs requires an OPC setting effectively accounting for manufacturing and imaging constraints. Reticle-writing and imaging tool capabilities drive the choice for the minimum feature of an OPC model. Aggressiveness of an optical proximity correction is determined by a discretization setting for an OPC algorithm. Some OPC scheme parameters are there to restrict the minimum spacing and width to avoid circuit failures. The OPC minimum spacing parameter controls bridging lines. The OPC minimum width parameter limits the correction of trenches responsible for circuit breakdown. An aggressive choice of minimum spacing and width for an OPC setting can results in circuit failure: shortage or breakdown. The conservative approach results in poor circuit performance. The methodology was deployed at LSI Logic Corporation for empirical optimization of the OPC minimum spacing/width settings for a no failure imaging solution of OPCed masks. The proposed procedure is particularly beneficial for dark field metal interconnect masks. The approach was successfully validated for 130nm and 90nm backend technology metal layers.

Paper Details

Date Published: 6 December 2004
PDF: 10 pages
Proc. SPIE 5567, 24th Annual BACUS Symposium on Photomask Technology, (6 December 2004); doi: 10.1117/12.569640
Show Author Affiliations
Nadya Belova, LSI Logic Corp. (United States)
Neal P. Callan, LSI Logic Corp. (United States)

Published in SPIE Proceedings Vol. 5567:
24th Annual BACUS Symposium on Photomask Technology
Wolfgang Staud; J. Tracy Weed, Editor(s)

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