Abstract: The present invention discloses a circuit substrate including an insulation layer; a metal layer disposed on a first surface of the insulation layer; and a first solder pad and a second solder pad disposed on a second surface of the insulation layer opposite the metal layer. Shortest distances between soldering dots on the metal layer and a projected area of the first solder pad on the metal layer are shorter than a distance threshold, the shortest distance being a minimum value of vertical distances between each of the soldering dots on the metal layer and a side edge of the projected area of the first solder pad on the metal layer. The soldering dots on the metal layer correspond one-to-one to soldering dots on a corresponding die; and the side edge is adjacent to a projected area of the second solder pad on the metal layer.