Patent ID: 8785941
Filing Date: 2014-07-22
Classification: H01L

Abstract:
1. A thin-film semiconductor device having a thin-film semiconductor element for driving a display device, the thin-film semiconductor device comprising: a substrate; a first gate line disposed on the substrate, through which a control signal is applied to the thin-film semiconductor element; a metal line above the substrate, the metal line crossing the first gate line; a first gate electrode of the thin-film semiconductor element, the first gate electrode extending from the first gate line; a second gate electrode on the first gate electrode; a gate insulating film on the second gate electrode; a semiconductor layer on the gate insulating film; a metal electrode on the semiconductor layer, the metal electrode extending from the metal line; an insulating layer provided, between the first gate line and the metal line, in a crossing area in which the first gate line and the metal line cross, to secure a distance between the first gate line and the metal line, the insulating layer being different from the gate insulating film; and a second gate line in a same layer as the second gate electrode, and on and along the first gate line in other than the crossing area,