Patent ID: 7960655

Claim:
A printed circuit board (PCB) comprising: an insulating member; a cooling member in the insulating member, the cooling member having a cooling passageway configured to enable flow of a cooling fluid through the cooling member, wherein the cooling member comprises a rectangular parallelepiped duct having an inlet and an outlet, wherein: the inlet is configured to allow an inflow of the cooling fluid and is in fluid communication with the cooling passageway and exposed through a first side surface of the insulating member, and the outlet is configured to allow an outflow of the cooling fluid and is in fluid communication with the cooling passageway and exposed through a second side surface of the insulating member opposite to the first side surface; and a circuit pattern having a substantially planar first pattern formed on an upper surface of the insulating member and a substantially planar second pattern formed on a lower surface of the insulating member, wherein the insulating member and cooling member are sandwiched between the first pattern and the second pattern of the circuit pattern, wherein the cooling passageway and the circuit pattern extend in a first direction substantially in parallel, and the cooling passageway is arranged under the circuit pattern, wherein the cooling member further comprises an auxiliary cooling passageway in fluid communication with the cooling passageway and configured to receive an auxiliary cooling fluid, and wherein the auxiliary cooling passageway comprises: an auxiliary inlet in fluid communication with the auxiliary cooling passageway and exposed through a third side surface of the insulating member substantially perpendicular to the first and the second side surfaces and is configured to receive the auxiliary cooling fluid into the auxiliary cooling passageway; and an auxiliary outlet in fluid communication with the auxiliary cooling passageway and exposed through a fourth side surface of the insulating member opposite to the third side surface and is configured to discharge the auxiliary cooling fluid from the auxiliary cooling passageway.