Circuit board, method for manufacturing circuit board, and electronic device

An electronic device comprising:

• a circuit board;
• and
• an electronic part mounted on the circuit board,
• wherein the circuit board includes
• an insulating layer,
• a capacitor which is provided in the insulating layer and includes a dielectric layer, a first conductor layer provided on a first surface of the dielectric layer and including a first opening part, and a second conductor layer provided on a second surface opposite to the first surface of the dielectric layer and including a second opening part at a position corresponding to the first opening part,
• a first conductor via provided in the insulating layer, penetrating the dielectric layer, the first opening part and the second opening part, and being smaller than the first opening part and the second opening part in plan view, the first conductor via is not directly electrically coupled to the first conductor layer and the second conductor layer, the first conductor via includes a central area that is not conductive,
• a second conductor via provided in the insulating layer and making contact with the second conductor layer, and
• a third conductor layer provided on the insulating layer and electrically coupled to the first conductor via and the second conductor via.