Photoelectric conversion apparatus and camera

A photoelectric conversion apparatus comprising:

• a first substrate including a semiconductor region in which a plurality of pixels are arranged, each pixel including a photoelectric conversion element;
• and
• a second substrate including a semiconductor region in which at least a part of a circuit is arranged, the circuit including a signal processing circuit configured to process a signal based on charges generated in the photoelectric conversion element and a control circuit configured to supply a control signal to the plurality of pixels,
• wherein the first substrate and the second substrate are stacked such that a first face of the first substrate and a second face of the second substrate face each other,
• the first substrate comprises a plurality of electrically conductive portions and an insulating portion exposed at the first face,
• the second substrate comprises a plurality of electrically conductive portions and an insulating portion exposed at the second face,
• the plurality of electrically conductive portions of the first substrate and the plurality of electrically conductive portions of the second substrate are in contact with each other to form a plurality of connecting portions,
• the insulating portion of the first substrate and the insulating portion of the second substrate are in contact with each other to form an insulating connecting portion,
• the plurality of connecting portions includes one or more first connecting portions electrically connected to a first electrically conductive portion that is not exposed at the first face and the second face and two or more second connecting portions electrically connected to a second electrically conductive portion that is not exposed at the first face and the second face, and
• a part of the insulating connecting portion is placed between the second connecting portions,
• a number of the one or more first connecting portions electrically connected to the first electrical conductive portion is different from a number of the two or more second connecting portions electrically connected to the second electrical conductive portion.