In this paper, we analyzed the effects of doctoring process on the patterns of Ag in gravure off-set printing. The parameters of doctoring process were the angle and the pressure, which was represented by the depth of movement to the gravure roll, of doctor blade to the surface of gravure roll, and the angle of patterns engraved on the gravure roll to doctor blade moving direction. The proper parameters were extracted for the fine patterns and they were 15 mm for the pressure, 60° for the blade angle. And the angle of patterns with respect to blade movement should be less than 40° for the best results. The gravure off-set printing with the above parameters was carried out print gate electrodes and scan bus lines of OTFT-backplane for e-paper. The line width of 50㎛ was successfully obtained. The thickness of electrodes was 2.5㎛and the surface roughness was 0.65㎛ and sheet resistance was 15.8 Ω/□.

Citations

• Development of doctoring apparatus capable of measurement and control of doctoring angle and force in printing equipment for printed electronics
  Sungwoong Jeon, Cheol Kim, Chung Hwan Kim
  Measurement Science and Technology.2018; 29(9): 095006.     CrossRef
• Control and measurement of doctoring angle at deformed state in doctoring apparatus for printed electronics
  Sung Woong Jeon, Cheol Kim, Chung Hwan Kim
  International Journal of Precision Engineering and Manufacturing.2017; 18(5): 633.     CrossRef