| abstract |
A metal sintering bonded body excellent in heat cycle resistance and heat radiation property is provided. The metal sintering bonded body according to the present invention is characterized in that the substrate and the die are bonded to each other, and at least a central portion and a corner portion of the rectangular region where the metal sintering bonded body faces the die have a low porosity region lower than an average porosity of the rectangular region, Is located in a band-shaped region whose center line is a diagonal line of the rectangular-shaped region. |