Patent ID: 8488321
Filing Date: 2013-07-16
Classification: H01L,H05K

Abstract:
1. An assembly for liquid cooling electronics by direct submersion into circulated engine coolant, said assembly comprising: a housing configured to define a coolant inlet, a coolant outlet, and an opening providing access to engine coolant between the coolant inlet and the coolant outlet; a plate configured to cooperate with the housing to form a fluidic seal along a perimeter of the opening, said plate also configured to define a via through the plate; a circuit board fixedly attached to the plate outside the housing, said circuit board configured to provide an electrical contact proximate to the via; an electronic device having a substantially planar shape that defines a plane, said electronic device located proximate to the plate inside the housing and oriented to protrude into the coolant path such that the plane is substantially parallel to a flow direction of the engine coolant; a first heat spreader fixedly attached to a first planar side of the electronic device, said first heat spreader configured to define a first lead to electrically coupled the electronic device to the circuit board through the via; a second heat spreader fixedly attached to a second planar side of the electronic device opposite the first planar side, said second heat spreader configured to define a second lead to electrically coupled the electronic device to the circuit board through the via, wherein the electronic device, the first heat spreader, and the second heat spreader form an arrangement; an epoxy material region dispensed around the leads in a manner effective to mechanically secure the arrangement to the plate and prevent engine coolant leakage around the leads; and a coating layer deposited in a manner effective to protect the electronic device from the engine coolant.