Electrical device with connection interface, circuit board thereof, and method for manufacturing the same

The present invention discloses an electrical device with a connection interface, a circuit board thereof, and a method for manufacturing the same. The electrical device with a connection interface includes: a circuit board on which a first circuit layer and a second circuit layer are formed and the second circuit layer has plural terminal pads, wherein a cavity is formed in the terminal pads and extends to the first circuit layer, and a metal layer is disposed in the cavity and connected to the first circuit layer and the terminal pads and defines an opening; a semiconductor chip electrically connected to the first circuit layer; and a conductive element interlaid in the opening. The electrical device with a connection interface does not need to be formed by assembling a terminal module because the conductive element is directly mounted on the circuit board.