Display apparatus

A display apparatus comprising:

• a first substrate including a first surface;
• a first pixel circuit arranged on the first surface of the first substrate;
• a second substrate arranged on the first pixel circuit and including a second surface facing the first surface and a third surface opposite the second surface;
• a first pad electrode arranged between the first surface of the first substrate and the second surface of the second substrate;
• a second pixel circuit arranged on the third surface of the second substrate and overlapping the first pixel circuit;
• a first through electrode passing through the second substrate and electrically connected to the second pixel circuit;
• a second pad electrode arranged on the second surface of the second substrate, electrically connected to the first through electrode, and contacting the first pad electrode;
• and
• a planarization layer at least partially arranged between the first surface of the first substrate and the second surface of the second substrate, wherein the second substrate and the second pixel circuit are embedded in the planarization layer.