Patent ID: 9024322
Filing Date: 2015-05-05
Classification: H01L

Abstract:
1. A Cu alloy film, for a wiring structure comprising: an oxide semiconductor layer of a thin-film transistor; the Cu alloy film, which is an electrode; and a passivation film, wherein the oxide semiconductor layer, the Cu alloy film, and the passivation film are arranged above a substrate in that order from the substrate, the Cu alloy film has a multilayer structure including a first layer (X) and second layer (Z) arranged in that order from the substrate, the first layer (X) is made of pure Cu or a Cu alloy which mainly contains Cu and which is lower in electrical resistivity than the second layer (Z), the second layer (Z) is made of a Cu—Z alloy containing 2 to 20 atomic percent of at least one element Z selected from the group consisting of Zn, Ni, Ti, Al, Mg, Ca, W, Nb, rare-earth elements, Ge, and Mn in total, and at least one portion of the second layer (Z) is directly connected to the passivation film, and the first layer (X) is in direct contact with the oxide semiconductor layer.