Abstract:
A thin film transistor comprising a one conductivity type semiconductor layer (11), a source region (12) and a drain region (13) provided in the semiconductor layer while spaced apart from each other, and a gate electrode (14) provided above or below the semiconductor layer through an insulation film, characterized in that the length (Ws) of a junction face of the source region and a channel region (16) provided between the source region and the drain region is different from the length (Wd) of a junction face of the channel region and the drain region.