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Proceedings Paper

Establishing fast, practical, full-chip ILT flows using machine learning
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Paper Abstract

Since its introduction at Luminescent Technologies and continued development at Synopsys, Inverse Lithography Technology (ILT) has delivered industry leading quality of results (QOR) for mask synthesis designs. With the advent of powerful, widely deployed, and user-friendly machine learning (ML) training techniques, we are now able to exploit the quality of ILT masks in a ML framework which has significant runtime benefits. In this paper we will describe our MLILT flow including training data selection and preparation, network architectures, training techniques, and analysis tools. Typically, ILT usage has been limited to smaller areas owing to concerns like runtime, solution consistency, and mask shape complexity. We will exhibit how machine learning can be used to overcome these challenges, thereby providing a pathway to extend ILT solution to full chip logic design. We will demonstrate the clear superiority of ML-ILT QOR over existing mask synthesis techniques, such as rule based placements, that have similar runtime performance.

Paper Details

Date Published: 23 March 2020
PDF: 18 pages
Proc. SPIE 11327, Optical Microlithography XXXIII, 1132706 (23 March 2020);
Show Author Affiliations
Thomas Cecil, Synopsys, Inc. (United States)
Kyle Braam, Synopsys, Inc. (United States)
Ahmed Omran, Synopsys, Inc. (United States)
Amyn Poonawala, Synopsys, Inc. (United States)
Jason Shu, Synopsys, Inc. (United States)
Clark Vandam, Synopsys, Inc. (United States)

Published in SPIE Proceedings Vol. 11327:
Optical Microlithography XXXIII
Soichi Owa, Editor(s)

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