HEAT-DISSIPATING MEMBER AND MANUFACTURING METHOD FOR SAME

Provided is a substantially rectangular and plate-shaped heat dissipation member including a metal-silicon carbide composite containing Al or Mg. Among two main surfaces of the heat dissipation member, one main surface is curved to be convex in an outward direction of the heat dissipation member and the other main surface is curved to be convex in an inward direction of the heat dissipation member. In a curve C of the other main surface in a cross-sectional view of the heat dissipation member showing a cross-section that is substantially perpendicular to the heat dissipation member and passes both middle points of two short sides of the other main surface, when a straight line passing through both endpoints P1 and P2 of the curve C is represented by l1, a point at which a distance to l1 on the curve C is maximum is represented by Pmax, an intersection point between l1 and a perpendicular drawn from Pmax to l1 is represented by P3, a middle point of a line segment P1P3 is represented by P4, an intersection point between the curve C and a straight line that passes through P4 and is perpendicular to l1 is represented by Pmid, a length of the line segment P1P3 is represented by L, a length of a line segment P3Pmax is represented by H, and a length of a line segment P4Pmid is represented by h, (2h/L)/(H/L) is 1.1 or more.