2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Polyimides with Fluorenyl Side Groups and Their Unusual, Unique Alignability of Liquid Crystals at the Film Surface

S.G. Hahm, T.J. Lee and M. Ree
Pohang University of Science and Technology, KR

Keywords:
liquid crystal (LC) alignment, polyimides

Abstract:
Polyimides (PIs) have been widely used in the microelectronics industry as dielectric materials because of their advantageous properties. In the present study, we synthesized CBDA-FDA and its analogue, poly(4,4’-(9,9-fluorenyl)diphenylene pyromellitimide) (PMDA-FDA) and then investigated quantitatively the orientational distributions of the polymer chain segments in the surfaces of their films by using linearly polarized FT-IR spectroscopy and optical retardation analysis

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