Eliminating the Trade‐Off between the Throughput and Pattern Quality of Sub‐15 nm Directed Self‐Assembly via Warm Solvent Annealing |
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Authors: | Jong Min Kim YongJoo Kim Woon Ik Park Yoon Hyung Hur Jae Won Jeong Dong Min Sim Kwang Min Baek Jung Hye Lee Mi‐Jeong Kim Yeon Sik Jung |
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Affiliation: | 1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Yuseong‐gu, Daejeon, Republic of Korea;2. Samsung Advanced Institute of Technology (SAIT), Yongin‐si, Gyeonggi‐do, Republic of Korea |
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Abstract: | The directed self‐assembly (DSA) of block copolymers (BCPs) has been suggested as a promising nanofabrication solution. However, further improvements of both the pattern quality and manufacturability remain as critical challenges. Although the use of BCPs with a high Flory‐Huggins interaction parameter (χ) has been suggested as a potential solution, this practical self‐assembly route has yet to be developed due to their extremely slow self‐assembly kinetics. In this study, it is reported that warm solvent annealing (WSA) in a controlled environment can markedly improve both the self‐assembly kinetics and pattern quality. A means of avoiding the undesirable trade‐off between the quality and formation throughput of the self‐assembled patterns, which is a dilemma which arises when using the conventional solvent vapor treatment, is suggested. As a demonstration, the formation of well‐defined 13‐nm‐wide self‐assembled patterns (3σ line edge roughness of ≈2.50 nm) in treatment times of 0.5 min (for 360‐nm‐wide templates) is shown. Self‐consistent field theory (SCFT) simulation results are provided to elucidate the mechanism of the pattern quality improvement realized by WSA. |
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Keywords: | block copolymers directed self‐assembly warm solvent annealing pattern quality throughput |
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