Transistor, semiconductor device, and electronic device
摘要
說明書
The electrode 686, the wiring 487, and the like may each have a structure in which a plurality of conductive layers are stacked. For example, the electrode 686 can include a conductive layer 686a and a conductive layer 686b, and the wiring 487 can include a conductive layer 487a and a conductive layer 487b (not illustrated). For example, the conductive layer 686a and the conductive layer 487a may be made of a low-resistance metal or the like, and the conductive layer 686b and the conductive layer 487b may be made of a metal or the like that exhibits an excellent contact property with the photoelectric conversion layer 681. Such a structure improves the electrical properties of the photoelectric conversion element. Note that some kinds of metal may cause electrochemical corrosion by being in contact with the light-transmitting conductive layer 682. Even when such a metal is used in the conductive layer 487a, electrochemical corrosion can be prevented by the conductive layer 487b.
The conductive layer 686b and the conductive layer 487b can be formed using, for example, molybdenum, tungsten, or the like. The conductive layer 686a and the conductive layer 487a can be formed using, for example, aluminum, titanium, or a stack of titanium, aluminum, and titanium that are stacked in this order.
