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- W1982058286 abstract "Diminishing error tolerance renders the customization of patterns created through directed self-assembly (DSA) extremely challenging at tighter pitch. A self-aligned customization scheme can be achieved using a hybrid prepattern comprising both organic and inorganic regions that serves as a guiding prepattern to direct the self-assembly of the block copolymers as well as a cut mask pattern for the DSA arrays aligned to it. In this paper, chemoepitaxy-based self-aligned customization is demonstrated using two types of organic-inorganic prepatterns. CHEETAH prepattern for “CHemoepitaxy Etch Trim using a self-Aligned Hardmask” of preferential hydrogen silsesquioxane (HSQ, inorganic resist), non-preferential organic underlayer is fabricated using electron beam lithography. Customized trench or hole arrays can be achieved through co-transfer of DSA-formed arrays and CHEETAH prepattern. Herein, we also introduce a tone-reversed version called reverse-CHEETAH (or rCHEETAH) in which customized line segments can be achieved through co-transfer of DSA-formed arrays formed on a prepattern wherein the inorganic HSQ regions are nonpreferential and the organic regions are PMMA preferential. Examples of two-dimensional self-aligned customization including 25nm pitch fin structures and an 8-bar “IBM” illustrate the versatility of this customization scheme using rCHEETAH." @default.
- W1982058286 created "2016-06-24" @default.
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- W1982058286 date "2015-03-19" @default.
- W1982058286 modified "2023-09-26" @default.
- W1982058286 title "Customization and design of directed self-assembly using hybrid prepatterns" @default.
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- W1982058286 doi "https://doi.org/10.1117/12.2086973" @default.
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