Stochastic Patterning Simulation Using Attenuated Phase-Shift Mask for Extreme Ultraviolet Lithography
- Authors
- Hong, Seongchul; Jeong, Seejun; Lee, Jae Uk; Lee, Seung Min; Ahn, Jinho
- Issue Date
- Sep-2013
- Publisher
- IOP PUBLISHING LTD
- Citation
- APPLIED PHYSICS EXPRESS, v.6, no.9, pp.1 - 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED PHYSICS EXPRESS
- Volume
- 6
- Number
- 9
- Start Page
- 1
- End Page
- 5
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/162074
- DOI
- 10.7567/APEX.6.096501
- ISSN
- 1882-0778
- Abstract
- In extreme ultraviolet lithography, the photon shot noise effect is a main cause of low-quality imaging characteristics such as line edge roughness and critical dimension (CD) nonuniformity. In this study, the stochastic imaging property of an attenuated phase-shift mask (PSM) was evaluated, and the results showed that "informative" photons from the first order diffraction are essential for mitigating the photon shot noise effect. This structure exhibits a reflectivity of similar to 6% at the absorber stack and a phase shift of 180 degrees at 13.5 nm wavelength. The improved stochastic patterning properties of the PSM were compared with those of a conventional binary intensity mask.
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