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Technology Nodes Below 130nm: A Breakthrough in Mask Data Processing
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CORINNE MIRAMOND, DOMINIQUE GOUBIER & MICHAEL CHOMAT, STMicroelectronics, Crolles, France YORICK TROUILLER, LETI-CEA, France YVES RODY, Philips Semiconductors, France OLIVIER TOUBLAN, Mentor Graphics
ABSTRACT
The introduction of strong optical proximity correction (OPC) to process 0.13 μm designs and below has induced a new data-processing flow. This has been implemented at STMicroelectronics Crolles using a Mentor Graphics software suite. To deal more easily with model-based corrections and additional verification on critical layers, a separation of the design database into critical and non-critical layers has been introduced. The resist model and the correction parameters needed during the OPC processing are developed in an iterative way. File sizes and data-processing time are the main issues in mask data preparation. The impact on mask manufacturing is also addressed in this article.
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