Layout impact of resolution enhancement techniques: impediment or opportunity?
Proceedings of the 2003 international symposium on Physical design
Semiconductors: a little light magic
IEEE Spectrum
Optical proximity correction (OPC): friendly maze routing
Proceedings of the 41st annual Design Automation Conference
RADAR: RET-aware detailed routing using fast lithography simulations
Proceedings of the 42nd annual Design Automation Conference
Maze routing with OPC consideration
Proceedings of the 2005 Asia and South Pacific Design Automation Conference
Efficient process-hotspot detection using range pattern matching
Proceedings of the 2006 IEEE/ACM international conference on Computer-aided design
Modeling litho-constrained design layout
Proceedings of the 44th annual Design Automation Conference
Accurate detection for process-hotspots with vias and incomplete specification
Proceedings of the 2007 IEEE/ACM international conference on Computer-aided design
ELIAD: efficient lithography aware detailed router with compact post-OPC printability prediction
Proceedings of the 45th annual Design Automation Conference
Predictive formulae for OPC with applications to lithography-friendly routing
Proceedings of the 45th annual Design Automation Conference
Multilevel Full-Chip Gridless Routing With Applications to Optical-Proximity Correction
IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
SAT based multi-net rip-up-and-reroute for manufacturing hotspot removal
Proceedings of the Conference on Design, Automation and Test in Europe
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In this paper, an automatic lithography hotspot fix guidance generation method based on optical simulation engine and a fix flow utilizing this method are proposed. We find that subject to shape changes of original layout, there is strong correlation between the optical intensity maps of pre-OPC and post-OPC layouts. From this fact, we develop a fix action generation method by optimizing optical intensity in terms of polygon changes near a litho hotspot in a pre-OPC layout. Fix guidances as a subset of fix actions of a hotspot can be selected by a greedy method. The fix guidances are used as input to router to fix the hotspots. We integrate this fix guidance generation method with commercial lithography hotspot detection tool to create a post-route lithography hotspot fixing flow and test with industry 65nm designs. Compared with commercial flow, our method has 1.4X~1.9X fix rate with similar run time. The circuit timing impact is negligible in both our flow and industry flow. And our flow will not introduce any new design rule check (DRC) violation.