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25 March 2016 Directed self-assembly materials for high resolution beyond PS-b-PMMA
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To extend directed self-assembly (DSA) of poly(styrene-b-methyl methacrylate) (PS-b-PMMA) for higher resolution, placement accuracy and potentially improved pattern line edge roughness (LER), we have developed a next-generation material platform of organic high-χ block copolymers (“HC series”, AZEMBLYTM EXP PME-3000 series). The new material platform has a built-in orientation control mechanism which enables block copolymer domains to vertically selforient without topcoat/additive or delicate solvent vapor annealing. Furthermore, sub-10 nm lines and spaces (L/S) patterning by two major chemoepitaxy DSA, LiNe and SMARTTM processes, was successfully implemented on 12” wafer substrates by using the PME-3000 lamellar series. The results revealed that the new material platform is compatible with the existing PS-b-PMMA-based chemical prepatterns and standard protocols. We also introduced the built-in orientation control strategy to the conventional PS-b-PMMA system, producing a new generation of PS-b-PMMA materials with facile orientation control. The modified PS-b-PMMA (m-PS-b-PMMA) performed LiNe flow DSA yielding a comparable CD process window with improved LER/LWR/SWR after the L/S patterns were transferred into a Si substrate.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eri Hirahara, Margareta Paunescu, Orest Polishchuk, EunJeong Jeong, Edward Ng, Jianhui Shan, Jian Yin, Jihoon Kim, Yi Cao, Jin Li, SungEun Hong, Durairaj Baskaran, and Guanyang Lin "Directed self-assembly materials for high resolution beyond PS-b-PMMA", Proc. SPIE 9779, Advances in Patterning Materials and Processes XXXIII, 977914 (25 March 2016);

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