| 초록 |
Self-assembled block copolymer (BCP) thin-films have shown their great potential as a template for sub-50 nm scale lithography, which is otherwise difficult to achieve by the conventional top-down photo-lithography. The morphology and dimension of BCP nano-template can be readily controlled by adjusting the molecular weight and volume fraction of the BCP employed. Since the periodic size of lamellar structure of linear BCP is proportional to the 2/3 order of its molecular weight, increasing the periodic size over 100 nm is very challenging. In order to achieve such large scale periods, the molecular weight of linear BCP should be larger than 300 kg/mol and it is practically impossible due to many inherent limitations in its synthesis. In order to circumvent this problem, we have designed and synthesized a new bottle-brush (BB) BCP with precise architecture and molecular weight control. In contrast to linear BCP, the domain size of BB-BCP is governed by the backbone chain length; thereby it is easier to achieve 100 nm-scale self-assembly. In this talk, our recent efforts to synthesize large molecular weight BB-BCPs and their self-assembly behaviour will be presented. |
