Patent ID: 8242595

Claim:
A heatsink adapted to be coupled to a mount surface of a header in which a supply path and a discharge path for passing a cooling fluid are formed, the heatsink comprising: a heatsink body which supports a heating element and in which a flow passage for the cooling fluid is formed therein, the heatsink body being coupled to the header so that a contact surface of the heatsink body is brought into contact with the mount surface of the header, wherein a first circulation orifice through which the cooling fluid is introduced from the supply path and a second circulation orifice through which the cooling fluid is discharged to the discharge path are formed on the contact surface of the heatsink body, a plurality of supply ports through which the cooling fluid is supplied to the first circulation orifice by communicating with the supply path and a plurality of discharge ports through which the cooling fluid is discharged communicating with the discharge path are formed on the mount surface of the header; a plurality of the heatsink bodies are coupled to the header, and the first circulation orifice is coupled to one of the supply ports in a watertight manner and the second circulation orifice is coupled to one of the discharge ports in a watertight manner, wherein a sheet-shape sealing member is interposed between the heatsink body and the header so as to couple between the heatsink body and the header in a watertight manner, and a supply hole which communicates the first circulation orifice and the supply port with each other and a discharge hole which communicates the second circulation orifice and the discharge port with each other are formed in the sealing member so as penetrate in a thickness direction of the sealing member.