Presentation + Paper
23 March 2021 Rule-based hotspot correction using a pattern matching flow
Bradley J. Falch, Tony Hu, Terry Hsuan, Elvis Yang, T. H. Yang, K. C. Chen, Rex Cheng, Linghui Wu, John Tsai, Lisa Huang, Elsley Tan
Author Affiliations +
Abstract
Mask synthesis and correction flows are becoming increasingly complex in order to deal with increasingly smaller lithography, resist, and etch effects that also increase in importance with increasingly smaller feature sizes. Time-to-mask is also a significant factor in production environments which leads tapeout teams to adopt correction strategies that usually only address effects at the best process condition. As a result, users frequently find hotspots, or process failures, when performing a final lithography verification step using multiple process conditions. In many cases, under production pressure to decrease time-to-mask, tapeout teams choose to correct these hotspots in the fastest manner possible. Performing rule-based fixes to the post-correction layout is usually the fastest method available. This paper will explore using rule-based, post-correction hotspot fixes in a flow using pattern matching. Pattern matching will be used to cluster the post-correction patterns into similar types which will be fixed by different algorithms for each type. Further, pattern matching will be used to find all instances of each pattern to mark for fixing along any similar patterns that may have been missed by the lithography check, or those that received asymmetrical correction.
Conference Presentation
© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bradley J. Falch, Tony Hu, Terry Hsuan, Elvis Yang, T. H. Yang, K. C. Chen, Rex Cheng, Linghui Wu, John Tsai, Lisa Huang, and Elsley Tan "Rule-based hotspot correction using a pattern matching flow", Proc. SPIE 11614, Design-Process-Technology Co-optimization XV, 1161408 (23 March 2021); https://doi.org/10.1117/12.2585531
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Lithography

Process modeling

Etching

Lead

Photomasks

RELATED CONTENT


Back to Top