The purpose of this paper is that evaluate of developed micro-gravure coater system and manufacture of thin film to be applied printed electronics, such as organic light emitting diodes (OLED), organics photovoltaic (OPV), organic thin film transistor (OTFT), etc. The micro-gravure coater has various modules such as web tension controller, micro-gravure coating unit, doctor blade, ink dispenser and hybrid dry units for NIR, hot air. Especially, this coating system is very suitable for mass or continuous process due to the applied for roll-to-roll (R2R) web moving method. So, this micro-gravure coating system have the advantage of higher processing time and lower manufacturing cost compare with conventional vacuum process. Also, this system is suitable for coated large area and controlled coating thickness compare with non-contact coating process, such as electrostatic spray deposition (ESD), aerosol-jet, etc. on the other hand, this system have disadvantage of substrate damage due to the contact with the substrate and micro-gravure patterned roll. However, from the view of productivity and cost, there are a lot more benefits than disadvantages. For this reason, we designed and manufactured the micro-gravure coating system based with R2R and we performed coating test with the various micro-gravure patterned roll and then through the various coating test, we ascertain whether or not developed the micro-gravure coating system for printed electronics.

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There has been growing interest and rapid development in transparent electrode films, which are flexible and light and used in mobile, simple information, and electronic devices, and based on recent advancements in nano technology, information technology, and display technology. In particular, studies on developing such films with both high conductivity and high transmittance of visible rays are highly in demand for commercialization. In this study, transparent electrode films were developed for IT using micro patterns that show sheet resistance less than 10 Ω/□, adhesive strength more than 98%, and light transmittance more than 90%. The results of applying a surface emission gradient minimization (Honey Comb) technology to the films was the verification of the sheet resistance, adhesive strength, and light transmittance satisfying the target level of this study through Imprinting and Remolding processes.

In this study a coating experiment was performed to fabricate blue light cut films, which represent a 390~430 nm cut off rate of more than 40% and a transmittance rate of more than 90%, using a roll-to-roll nano micro coating system. The study also analyzed the characteristics of the blue light cut films. Thus, the hardness, which is more than 3H, is ensured through fabricating films using a Sol-Gel process that will determine the proper hardness level. Also, the experiment shows excellent results by cutting blue light through a mixing blue light powder.

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