Patent ID: 9515190
Filing Date: 2016-12-06
CPC Classification: H01L

Claim Text:
1. A method for manufacturing polysilicon TFT, comprising the following steps: forming a semiconductor material layer on a prefabricated substrate; forming an intermediate layer on said semiconductor material layer; coating said intermediate layer with a photoresist material to form a photoresist layer, and exposing said photoresist layer with a photomask for a first time; moving the prefabricated substrate which has the photoresist layer treated by a first exposing treatment in a predetermined direction relative to said photomask, and exposing said photoresist layer with said photomask for a second time; removing an exposed photoresist material from said photoresist layer, so as to form a photoresist region and a hollowed-out region on said photoresist layer, wherein said photoresist region comprises a central part and a wing part, and said hollowed-out region contains no photoresist material; and forming an ion lightly doped region corresponding to said wing part and an ion heavily doped region corresponding to said hollowed-out region in said semiconductor material layer, said ion heavily doped region being used for forming a source and a drain.