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• W2028961692 startingPage "1844" @default.
• W2028961692 abstract "The directed self-assembly of block copolymer (BCP) offers a new route to perfect nanolithographic patterning at sub-50 nm length scale with molecular scale precision. We have explored the feasibility of using the BCP approach versus the conventional electron beam (e-beam) lithography to create highly dense dot patterns for bit-patterned media (BPM) applications. Cylinder-forming poly(styrene-b-methyl methacrylate) (PS-b-PMMA) directly self-assembled on a chemically prepatterned substrate. The nearly perfect hexagonal arrays of perpendicularly oriented cylindrical pores at a density of approximately 1 Terabit per square inch (Tb/in.(2)) are achieved over an arbitrarily large area. Considerable gains in the BCP process are observed relative to the conventional e-beam lithography in terms of the dot size variation, the placement accuracy, the pattern uniformity, and the exposure latitude. The maximum dimensional latitude in the cylinder-forming BCP patterns and the maximum skew angle that the BCP can tolerate have been investigated for the first time. The dimensional latitude restricts the formation of more than one lattice configuration in certain ranges. More defects in BCP patterns are observed when using low molecular weight BCP materials or on non-hexagonal prepatterns due to the dimensional latitude restriction. Finally, the limitations and challenges in the BCP approach that are associated with BPM applications will be briefly discussed." @default.
• W2028961692 created "2016-06-24" @default.
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• W2028961692 date "2009-07-02" @default.
• W2028961692 modified "2023-10-10" @default.
• W2028961692 title "Directed Block Copolymer Assembly <i>versus</i> Electron Beam Lithography for Bit-Patterned Media with Areal Density of 1 Terabit/inch² and Beyond" @default.
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• W2028961692 doi "https://doi.org/10.1021/nn900073r" @default.
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