||Flexible display industry has chosen a coating process rather than a stretching process recently. Additionally, the retardation film, which is the core of the antireflective film, have to exhibit a wavelength-independent phase retardation in the visible-light region to act as an ideal retarder. We satisfied all of these conditions, and we characterized this mechanism and process. In this work, we introduce that the newly synthesized X-shaped reactive mesogen (XRM), which has two C=N imine bonds, was designed as a retarder guest. The host molecule is HCM 026. The self-assembling of the two reactive mesogens made host RM layers normal to rubbing direction and XRM was aligned in perpendicular about the layers. This is ideal molecular arrangement of negative dispersion retarder. This work was supported by BRL (2015042417), Mid-Career Researcher Program (2016R1A2B2011041), BK21 Plus program.