Patent ID: 8331092

Claim:
A semiconductor element cooling apparatus comprising: a first member with a first surface on which a semiconductor element is mounted, and a second surface on which a plurality of fins of a predetermined height that extend from the second surface, and that define a plurality of coolant flow paths are formed, wherein the fins extend in a first direction, and that are separated from each other by predetermined distances; and a second member that defines the plurality of coolant flow paths, by closing spaces between the fins from a distal end side of the fins in a height direction of the fins, wherein grooves are formed in the fins and extend in a second direction that intersects the first direction, and which have a depth that extends from the distal end side of the fins in the height direction toward the second surface, and wherein the depth of the grooves is smaller than the height of the fins, and a protrusion-forming member is disposed in the grooves, extends across adjacent fins of the plurality of fins, and forms protrusions in the coolant flow paths defined by the adjacent fins.