| 摘要 |
PURPOSE:To prevent an increase in an OFF current due to back light at the time of using a thin film transistor having electrodes of a comblike structure, as a pixel switch of a liquid crystal display without complicated structure. CONSTITUTION:In a thin film transistor having a gate electrode 2 formed on an insulating board 1, a gate insulating film 3, a semiconductor layer 4, and source, drain electrodes made of ohmic layer 5 and metal layer 6 of a comblike structure, the comb teeth of the source/drain electrode do not cross the electrode 2, and the teeth edges are disposed on the electrode 2. Even if an electric resistance of the semiconductor layer except the gate electrode is reduced due to back light, if the edges of the teeth of the source/drain electrodes are disposed on the gate electrode, a leakage current at the time of OFF is not increased. |
