액정 디스플레이의 산업 규모는 놀라운 속도로 확대되고 있다. 그 원동력이 된 것이 박막 트랜지스터(Thin Film Transistor: TFT) 기술의 발전에 있다. 비정질 실리콘(Amorphous Silicon: a-Si) TFT 기술은 대형 액정 TV를 탄생시키고, 저온 폴리실리콘 TFT는 휴대전화 등의 중소형 디스플레이와 AMOLED의 핵심 기술이 되었다. 또한 다양한 TFT 기술 seeds가 계속해서 출현하여 정보 인프라와 생활 스타일에 맞춘 새로운 정보기기의 출현을 예감시키고 있다. 새로운 응용제품의 요구는 새로운 기술 개발의 견인차가 되고 있다. 최근에는 이러한 요구에 따라 산화물 TFT, 마이크로 결정실리콘(microcrystalline Si: µc-Si) TFT, 유기물 TFT 등의 기술도 활발하게 연구개발되고 있다. 본고에서는 지금까지의 TFT 기술 개발의 발전사를 뒤돌아보고 지금부터의 발전 방향을 박막 트래지스터 기술 이노베이션 관점으로부터 전망하였다.
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