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A Study on Processing of TFT Electrodes for Digital Signage Display using a Reverse Offset Printing

리버스옵셋 프린팅을 이용한 디지털 사이니지 디스플레이용 TFT 전극 형성 공정 연구

  • Yoon, Sun Hong (Korea Printed Electronics Center, Korea Electronics Technology Institute) ;
  • Lee, Junsang (Korea Printed Electronics Center, Korea Electronics Technology Institute) ;
  • Lee, Seung Hyun (Korea Printed Electronics Center, Korea Electronics Technology Institute) ;
  • Lee, Bum-Joo (Korea Printed Electronics Center, Korea Electronics Technology Institute) ;
  • Shin, Jin-Koog (Korea Printed Electronics Center, Korea Electronics Technology Institute)
  • 윤선홍 (전자부품연구원 전북인쇄전자센터) ;
  • 이준상 (전자부품연구원 전북인쇄전자센터) ;
  • 이승현 (전자부품연구원 전북인쇄전자센터) ;
  • 이범주 (전자부품연구원 전북인쇄전자센터) ;
  • 신진국 (전자부품연구원 전북인쇄전자센터)
  • Received : 2014.04.27
  • Accepted : 2014.05.20
  • Published : 2014.06.01

Abstract

The digital signage display is actively researched as the next generation of large FPD. To commercialize those digital signage display, the manufacturing cost must be downed with printing method instead of conventional photolithography. Here, we demonstrate a reverse offset printed TFT electrodes for the digital signage display. For the fabricated source/drain and gate electrode, we used Ag ink, silicone blanket, Clich$\acute{e}$ and reverse offset printer. We printed uniform TFT electrode patterns with narrow line width(10 ${\mu}m$ range) and thin thickness(nm range). In the end the printing source/drain and gate electrode are successfully achieved by optimization of experimental conditions such as Clich$\acute{e}$ surface treatment, ink coating process, delay time, off/set process and curing temperature. Also, we checked that the printing align accuracy was within 5 ${\mu}m$.

Keywords

References

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