Patent ID: 8598458

Claim:
An electronic device comprising: an electronic component; a joining member to be mechanically joined with the electronic component; a metal conductor arranged between the electronic component and the joining member to mechanically join the electronic component and the joining member, wherein: the metal conductor is made of porous noble metal to have pores, the metal conductor includes an end surface uncovered by the electronic component and the joining member, and in a cross section of the metal conductor, the metal conductor before resin impregnation has: a largest dimension of metal particles contained in the metal conductor is a metal particle diameter in a range larger than 0.2 μm and smaller than 15 μm; a largest dimension of the pores contained in the metal conductor is a pore diameter in a range of 0.1 to 50 μm; and a pores area ratio of areas of the pores to an entire area on the cross section of the metal conductor is in a range of 5 to 40%; a mold resin configured to seal the electronic component, the joining member and the end surface of the metal conductor; a primer arranged at least between the end surface of the metal conductor and the mold resin to increase an adhesiveness therebetween; and a reinforcing resin impregnated from the end surface of the metal conductor to an inside of the metal conductor, to mechanically reinforce the metal conductor, wherein the primer and the reinforcing resin are made of a same resin material, and the reinforcing resin has a higher adhesion strength with the primer than the metal conductor.