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Proceedings Paper

Tracking defectivity of EUV and SADP processing using bright-field inspection
Author(s): Nadine Alexis; Chris Bencher; Yongmei Chen; Huixiong Dai; Kfir Dotan; Dale Huang; Alison Nalven; Chris Ngai; Gaetano Santoro; Bharath Vijayaraghavan; Peng Xie; Jun Xue
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Paper Abstract

The purpose of this study is to understand EUV+SADP defectivity in 15nm line and space (L&S) pattern, and to examine bright-field inspection capabilities at the 1Xnm node. Programmed defects of known size, shape, and location were printed in dense patterned areas using EUV lithography at IMEC. To track these defects throughout development, a defectivity study was conducted using bright-field inspection after four SADP processing steps. The smallest defect routinely detected had a programmed size of 14nm, and the defect signal was enhanced using polarized light. By comparing defect locations at the beginning and end stages of development, it was found that 95% of defects remained the same. This illustrates the importance of post-lithography wafer inspection. This research shows how defect characteristics on the EUV mask affect the final pattern and demonstrate the sensitivity of bright-field inspection at the 1Xnm node.

Paper Details

Date Published: 2 April 2014
PDF: 7 pages
Proc. SPIE 9050, Metrology, Inspection, and Process Control for Microlithography XXVIII, 905030 (2 April 2014); doi: 10.1117/12.2048356
Show Author Affiliations
Nadine Alexis, Applied Materials, Inc. (United States)
Chris Bencher, Applied Materials, Inc. (United States)
Yongmei Chen, Applied Materials, Inc. (United States)
Huixiong Dai, Applied Materials, Inc. (United States)
Kfir Dotan, Applied Materials, Inc. (United States)
Dale Huang, Applied Materials, Inc. (United States)
Alison Nalven, Applied Materials, Inc. (United States)
Chris Ngai, Applied Materials, Inc. (United States)
Gaetano Santoro, Applied Materials, Inc. (Belgium)
Bharath Vijayaraghavan, Applied Materials, Inc. (United States)
Peng Xie, Applied Materials, Inc. (United States)
Jun Xue, Applied Materials, Inc. (United States)

Published in SPIE Proceedings Vol. 9050:
Metrology, Inspection, and Process Control for Microlithography XXVIII
Jason P. Cain; Martha I. Sanchez, Editor(s)

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