Substrate for electro-optical device, electro-optical device, and electronic apparatus

A substrate for an electro-optical device, the substrate comprising:

• a first substrate;
• a pixel electrode provided on the first substrate, the pixel electrode being made of a first material;
• a plurality of interlayer insulating films stacked between the first substrate and the pixel electrode;
• a switching element provided between the first substrate and the plurality of interlayer insulating films;
• a first lens provided between the first substrate and the switching element, the first lens overlapping, in plan view, with the pixel electrode;
• a second lens provided between the switching element and the pixel electrode, the second lens overlapping, in plan view, with the pixel electrode;
• and
• a plug provided between the switching element and the pixel electrode, the plug overlapping, in plan view, with the pixel electrode, the plug being made of a second material different from the first material, wherein
• the second lens includes a second lens surface and a second lens layer, the second lens surface is in contact with a first interlayer insulating film of the plurality of interlayer insulating films, and the second lens layer having a refractive index different from a refractive index of the first interlayer insulating film,
• the first interlayer insulating film includes a contact hole in a location not overlapping, in plan view, with the second lens surface, the contact hole being filled with the second material as the plug,
• the plug is in contact with the pixel electrode and a relay electrode formed under the first interlayer insulating film, the pixel electrode being electrically connected through the plug and the relay electrode to the switching element, and
• a surface of a pixel electrode side of the second lens layer and a surface of a pixel electrode side of the first interlayer insulating film in combination constitute a continuous flat surface.