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19 May 2011 Mask data processing technique using GPU for reducing computer cost
Ryo Tsujimura, Kozo Ogino, Hiromi Hoshino, Shigeo Satoh, Kazumasa Morishita, Satoshi Yoshikawa, Hiroki Futatsuya, Tatsuo Chijimatsu, Satoru Asai, Satoshi Yamauchi, Tomoyuki Okada, Naoyuki Ishiwata, Motoshu Miyajima
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Proceedings Volume 8081, Photomask and Next-Generation Lithography Mask Technology XVIII; 80810I (2011) https://doi.org/10.1117/12.899496
Event: Photomask and NGL Mask Technology XVIII, 2011, Yokohama, Japan
Abstract
The computer cost for mask data processing grows increasingly more expensive every year. However the Graphics Processing Unit (GPU) has evolved dramatically. The GPU which originally was used exclusively for digital image processing has been used in many fields of numerical analysis. We developed mask data processing techniques using GPUs together with distributed processing that allows reduced computer costs as opposed to a distributed processing system using just CPUs. Generally, for best application performance, it is important to reduce conditional branch instructions, to minimize data transfer between the CPU host and the GPU device, and to optimize memory access patterns in the GPU. Hence, in our optical proximity correction (OPC), the light intensity calculation step, that is the most time consuming part of this OPC, is optimized for GPU implementation and the other inefficient steps for GPU are processed by CPUs . Moreover, by fracturing input data and balancing a computational road for each CPU, we have put the powerful distributed computing into practice. Furthermore we have investigated not only the improvement of software performance but also how to best balance computer cost and speed, and we have derived a combination of the CPU hosts and the GPU devices to maximize the processing performance that takes computer cost into account . We have also developed a recovery function that continues OPC processing even if a GPU breaks down during mask data processing for a production. By using the GPUs and distributed processing, we have developed a mask data processing system which reduces computer cost and has high reliability.
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Ryo Tsujimura, Kozo Ogino, Hiromi Hoshino, Shigeo Satoh, Kazumasa Morishita, Satoshi Yoshikawa, Hiroki Futatsuya, Tatsuo Chijimatsu, Satoru Asai, Satoshi Yamauchi, Tomoyuki Okada, Naoyuki Ishiwata, and Motoshu Miyajima "Mask data processing technique using GPU for reducing computer cost", Proc. SPIE 8081, Photomask and Next-Generation Lithography Mask Technology XVIII, 80810I (19 May 2011); https://doi.org/10.1117/12.899496
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KEYWORDS
Optical proximity correction
Data processing
Photomasks
Computing systems
Distributed computing
Manufacturing
Graphics processing units
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