A new self-aligned offset staggered polysilicon thin-film transistor

A new self-aligned offset staggered polysilicon thin-film transistor (poly- Si TFT) has been proposed and demonstrated to have a suppressed leakage cur rent. For the self-aligned offset structure, planarization with thick photo resist and etchback of photoresist are successfully utilized, The offset le ngth can be easily controlled by the thickness of the gate material without photolithographic limitation. In the self-aligned offset polysilicon TFT's , the leakage current decreases with an increasing offset length.