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Proceedings Paper

Effective decomposition algorithm for self-aligned double patterning lithography
Author(s): Hongbo Zhang; Yuelin Du; Martin D. F. Wong; Rasit Topaloglu; Will Conley
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Paper Abstract

Self-aligned double patterning (SADP) lithography is a novel lithography technology that has the intrinsic capability to reduce the overlay in the double patterning lithography (DPL). Although SADP is the critical technology to solve the lithography difficulties in sub-32nm 2D design, the questions - how to decompose a layout with reasonable overlay and how to perform a decomposability check - are still two open problems with no published work. In this paper, by formulating the problem into a SAT formation, we can answer the above two questions optimally. This is the first published paper with detailed algorithm to perform the SADP decomposition. In a layout, we can efficiently check whether a layout is decomposable. For a decomposable layout, our algorithm guarantees to find a decomposition solution with reasonable overlay reduction requirement. With little changes on the clauses in the SAT formula, we can address the decomposition problem for both the positive tone process and the negative tone process. Experimental results validate our method, and decomposition results for Nangate Open Cell Library and larger test cases are also provided with competitive run times.

Paper Details

Date Published: 22 March 2011
PDF: 11 pages
Proc. SPIE 7973, Optical Microlithography XXIV, 79730J (22 March 2011); doi: 10.1117/12.879324
Show Author Affiliations
Hongbo Zhang, Univ. of Illinois at Urbana-Champaign (United States)
Yuelin Du, Univ. of Illinois at Urbana-Champaign (United States)
Martin D. F. Wong, Univ. of Illinois at Urbana-Champaign (United States)
Rasit Topaloglu, GlobalFoundaries Corp. (United States)
Will Conley, Freescale Semiconductor Corp. (United States)

Published in SPIE Proceedings Vol. 7973:
Optical Microlithography XXIV
Mircea V. Dusa, Editor(s)

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