Electro-optical device with electrolytic corrosion preventing film and multiple relay electrodes

An electro-optical device comprising:

• above a substrate,
• a data line;
• a transistor electrically connected to the data line;
• a pixel electrode electrically connected to the transistor;
• an island-shaped first relay electrode that is separated laterally from the transistor, is located in a same layer as one layer of the transistor, and is electrically connected to the transistor;
• an island-shaped second relay electrode in a layer above the first relay electrode and electrically connected to the first relay electrode;
• an island-shaped third relay electrode in a layer above the second relay electrode, the third relay electrode being electrically connected to the second relay electrode and electrically connected to the pixel electrode, the third relay electrode having a multilayered structure including a conductor film and an electrolytic corrosion prevention film, the conductor film being formed from a single layer of aluminum, the electrolytic corrosion prevention film being formed from titanium or titanium nitride in a certain two-dimensional area on a substantially flat single surface of the conductor film and not being formed in other two-dimensional areas on the flat single surface of the conductor film;
• an interlayer insulating film formed between the pixel electrode and the third relay electrode;
• a contact hole provided in the interlayer insulating film at a position overlapping the certain two-dimensional area in plan view, the contact hole electrically connecting the pixel electrode and the third relay electrode in a contact portion;
• and
• a light shield formed from the same single layer of aluminum as the conductor layer of the third relay electrode and being electrically discontinuous from the conductor film of the third relay electrode, the light shield being electrically connected to a constant potential source to have a fixed potential, the light shield having a cutout section along an elongated portion thereof, the third relay electrode being disposed within the cutout section of the light shield in plan view, the second relay electrode covering the cutout section from a position below the third relay electrode.