(a) Composites of the hybrid type polyimide (HPI) developed for NIL. (b) Schematics showing the uneven distribution of the composites along the depth direction of the HPI film.
SFG spectra of the HPI, PAI, epoxy spin-coated films with the SSP polarization combination. A PEI film cannot be measured due to the damage by the laser and following large scattering. The baselines of the spectra are appropriately lifted for the guide to the eye.
AFM images of (a) the mold pattern and (b) the imprinted pattern on the HPI film.
Microscopic optical images of (a) the dark state without field, and (b) the bright state with the field of 4 V in an IPS LC cell.
(a) characteristics of a TN cell made with the PMMA film before and after the thermal aging test. AFM images of the PMMA film (b) before and (c) after the thermal aging test.
(a) characteristics of a TN cell made with the HPI film before and after the thermal aging test. AFM images of the PMMA film (b) before and (c) after the thermal aging test.
Multiple imprinting scheme: (a) Two-step nanoimprinting scheme, in the first step, the HPI film is imprinted by the mold with the groove pattern. In the second step, the HPI film is rotated to and then imprinted again with the same mold. (b) AFM image of the HPI surface created by the two-step nanoimprinting.
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