Patent ID: 7948758

Claim:
A circuit board unit comprising: a circuit board topmost laminate with conductive tracks on the upper side for mounting surface-mountable devices in a thickness dimensioned such that an estimated heat dissipated by the surface-mountable devices is transported from the upper side to the underside of the circuit board topmost laminate; an electrically insulating laminate arranged under the circuit board topmost laminate; inserts made of a material with good heat conductivity and electrical insulation embedded in the electrically insulating laminate at sites below surface-mountable devices with high heat dissipated; a cooling plate arranged below the electrically insulating laminate and the inserts, the cooling plate having a plurality of cooling passageways for circulating a liquid coolant through the cooling plate; and one or more plated through holes defined in the circuit board topmost laminate for transporting the high heat dissipated from the upper side to the underside of the topmost laminate, the one or more plated through holes located below surface-mountable devices with high heat dissipation, said plated through holes being adapted in number and design to an estimated heat dissipated of each surface-mountable device.