Patent ID: 8748752

Claim:
A method for mounting a second member on a first member, wherein a pad layer is provided on the first member, and wherein an annular aperture portion exposing the first member to a bottom of the aperture and having at least one discontinuous portion is provided in a region of the pad layer for mounting the second member having a mount face, the annular aperture portion having the same outer shape as the mount face of the second member, the method comprising: filling the aperture portion with a solder paste layer; and disposing the mount face of the second member on the solder paste layer, and melting and cooling the solder paste layer to mount the second member on the first member, wherein, the second member has a side face that extends from the mount face and is formed from copper, a copper alloy, an aluminum, or an aluminum alloy, and a film of poor solder wettability is formed on the side face of the second member.