| 摘要 |
A heat radiation plate made of metal includes a flat part (10a), cylindrical protrusion parts (10b) which are integrated with the flat part and protrude from one main surface of the flat part, and a metal reinforcement member (12) which is adjacent to the one main surface of the flat part, is arranged in a region arranged in the flat part, and has a higher melting point than the flat part and the cylindrical protrusion parts. The reinforcement member is extended in a direction parallel to the one main surface of the flat part, penetrates the flat part, and has an end part which is exposed to the outside. The entire surface of the reinforcement part except the end part is directly bonded to the flat part. |
