THIN FILM TRANSISTOR AND METHOD OF MAKING THE SAME

摘要

A thin film transistor is characterized by having an island-in structure having a semiconductor layer with a channel region, a bottom heavily-doped semiconductor layer, and a top heavily-doped semiconductor layer. The bottom heavily-doped semiconductor layer is positioned on two opposite sides of the surface of the semiconductor layer beyond the channel region. The top heavily-doped semiconductor layer, positioned on the bottom heavily-doped semiconductor layer, covers two opposite side walls of the bottom heavily-doped semiconductor layer and the semiconductor layer so that current leakage from the drain electrode to the source electrode is prevented.