| 초록 |
Recent interest in block copolymer (BCP) is to develop the long range lateral ordering in BCP films without undesired defects that impede the practical applications. In this study, the orientation of lamellar microdomains for the thin films of a symmetric polystyrene-b-poly(methyl methacrylate) (PS-b-PMMA) was evaluated with the defect distance (D) and orientational correlation length (ξ) to extract the power law relationships with film thicknesses. The lateral ordering of higher-molecular-weight (＞74 kg/mol) PS-b-PMMA films is enhanced by increasing film thickness, whereas in a low-molecular-weight (50 kg/mol) PS-b-PMMA, it is enhanced by decreasing film thickness below 1Lo. This study contributes an informative and comprehensive guide to the thickness-dependent long-range lateral ordering in BCP films. |
