| abstract |
A welding method for welding a first resin layer and a second resin layer, wherein a metal layer in which a void is formed is sandwiched between the first resin layer and the second resin layer, Laser irradiation is applied to at least one of the resin layer and the second resin layer, and the molten resin is penetrated through the metal layer to weld the first resin layer and the second resin layer. |