Abstract
Directional solidification of cylinder forming block copolymer films confined between a directionally crystallizing solvent (benzoic acid) and a topographically patterned silicon substrate imparts a particular orientation to the block copolymer microdomains that is dependent of the solidification direction and the local film thickness. The substrate features (30 nm high, 2μm wide square mesas on a 4μm sq lattice) shape the film morphology by periodically modulating the local film thickness. Thicker regions between substrate features (plateaus) exhibit in-plane cylinders aligned in the crystallization direction and thinner regions over the substrate features (mesas) display vertically aligned cylindrical domains. This approach is a simple and general technique for engineering an intended domain orientation in specific areas of a block copolymer film. Development of this method for nanolithographic applications is demonstrated through oxygen plasma reactive ion etching of the patterned cylindrical domains.
Original language | English |
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Pages (from-to) | 848-850 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 79 |
Issue number | 6 |
DOIs | |
Publication status | Published - 2001 Aug 6 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)