Printed circuit board

The utility model discloses a printed circuit board, comprising a first external layer, a second external layer, an integrated circuit disposed on the second external layer, a first decoupling capacitor, an inner layer, a first via hole, a second via hole, and a second decoupling capacitor. The integrated circuit is provided with a single exposed bonding pad which is electrically connected with ground reference, a first power pin which is electrically connected with a first power supply, and a second power pin which is electrically connected with a second power supply. The first decoupling capacitor is disposed on the second external layer closed to a first power supply pin. The first decoupling capacitor comprises a first terminal electrically connected with the first power supply pin, and also comprises a second terminal. The inner layer is inserted between the first external layer and the second external layer. The inner layer comprises a metal layer electrically connected with the ground reference. The fi