Patent ID: 6970485

Claim:
A cooling device, comprising: a first plate-like member made of metal, to which a cooled body is joined along the predetermined end portion; a second plate-like member made of metal, in which a cooling fluid introducing channel provided so as to reach an inlet opening portion, which introduces cooling fluid, and one end of an area connected to the inlet opening portion and corresponding to the end portion and a cooling fluid draining channel provided so as to reach an outlet opening portion, which drains cooling fluid, and the other end of the area connected to the outlet opening portion and corresponding to the end portion are formed; and a third plate-like member made of metal, which is formed along the area corresponding to the end portion and to which at least one cooling channel is provided through which cooling fluid flows straight in the longitudinal direction of the cooled body by communicating the cooling fluid introducing channel and the cooling fluid draining channel.