کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1399615 | 984476 | 2013 | 10 صفحه PDF | دانلود رایگان |
We report here the fabrication of periodic sub-25 nm diameter size cylinder structures using block copolymer (BCP) directed self-assembly on nanoimprinted topographically patterned substrates. Tailored polyhedral oligomeric silsesquioxanes (POSSs) films were spin coated onto silicon substrates and were patterned by nanoimprint lithography to produce topographies commensurable with the BCP domain spacing. The chemistry of the POSS was tuned to control the alignment and orientation of the BCP films. The substrates were used to direct the microphase separation (following toluene solvent annealing) of a hexagonal structure forming polystyrene-block-polydimethylsiloxane (PS-b-PDMS) having a domain spacing of 42.6 nm and PDMS cylinder widths of 23.7 nm. On more hydrophilic POSS substrates the cylinders were obtained parallel to the substrate plane and aligned with the topography. In contrast, in more hydrophobic POSS patterns, the cylinders align perpendicular to the substrate plane. The use of these methods for the nanofabrication of vias, nanofluidic devices or interconnect structures of sub-25 nm feature size is discussed.
Figure optionsDownload as PowerPoint slideHighlights
• Fabrication of cylindrical arrangements using PS-b-PDMS has been demonstrated.
• Nanoimprinted patterned substrates have been used to direct self-assembly.
• Functionalized POSS materials show promise in tuning surface chemistry.
• PS-b-PDMS films have been processed to yield surface features at the substrates.
Journal: European Polymer Journal - Volume 49, Issue 11, November 2013, Pages 3512–3521