抄録
This study introduces laser-assisted roller nanoimprinting of light-excitation films for flat illumination devices or flexible displays. In the laser-assisted roller nanoimprinting, the mold surface is directly heated by laser irradiation and the structures of mold are thermally replicated on thermoplastic polymer films. The conventional roller nanoimprinting method in which the whole mold is heated causes losing the shape of replicated patterns because the heat remains in the polymer after demolded. In order to prevent from the shape losing, we have proposed the thermal roller nanoimprinting with the mold surface heated by laser-scanning. On the other hand, a flat illumination device of an organic light-emitted diode (OLED) has interesting properties such as flexible, eye friendly, and energy saving. A microscale concave-and-convex surface with the lens array enhances the light emission from the light source because the ratio of the total reflection to inside can be reduced. The roller imprinting is useful for mass production of the large-area light-excitation film because of the low-cost setup, high-throughput, and continuous process.
