Patent ID: 9379038
Filing Date: 2016-06-28
CPC Classification: H01L,H05K

Claim Text:
1. A heat dissipation device including a base body, which is formed from a ceramic, and a plurality of refrigerant flow paths, through each of which a refrigerant flows in the base body, wherein the base body is formed by sintering a stacked body, which is formed by stacking ceramic sheets, the ceramic sheets include a plurality of ceramic sheets, each of which has a plurality of slits forming the plurality of refrigerant flow paths and a ceramic sheet that has a communication path that interconnects the plurality of refrigerant flow paths and an exterior of the heat dissipation device, the plurality of slits defines a plurality of fins partitioning the plurality of refrigerant flow paths, the heat dissipation device has a mounting portion on which a cooling subject that is to be cooled is mounted, the plurality of slits is formed so that the plurality of refrigerant flow paths formed in the heat dissipation device is arranged at a position corresponding to the mounting portion, each of the plurality of refrigerant flow paths includes at least one partition that partitions a slit in an extending direction of the slit, when the plurality of refrigerant flow paths is viewed along a cross-section extending in the extending direction of the slit and extending in a stacking direction of the ceramic sheets, the heat dissipation device includes a bottom plate portion located at an opposite side of a mounting portion, the bottom plate portion defines a bottom surface of the plurality of refrigerant flow paths, the bottom surface of the plurality of refrigerant flow paths includes a projection portion projecting toward the mounting portion, the projection portion and the partition face each other along a projecting direction of the projection portion so that the refrigerant flow paths are located between the projection portion and the partition, the partition and the mounting portion face each other along the projecting direction of the projection portion so that the refrigerant flow paths are located between the partition and the mounting portion.