A mounting structure for mounting a photovoltaic element onto a metal body,
which outputs a power generated by the photovoltaic element to the outside
surface, and a method for mounting the photovoltaic element. In the
mounting structure, the metal body has a first surface and a second
surface opposite the first surface, in which the photovoltaic element is
joined to the first surface and an electrically insulative material is
joined to the second surface. A semiconductor element-mounting substrate
for mounting a semiconductor element thereon comprising a retaining
substrate having a circuit pattern, which has an electrode-joining portion
for joining the semiconductor element electrode portion, an external
terminal-fixing portion, and a groove between the electrode-joining
portion and external-fixing portion, and a method for mounting the
semiconductor element. In the mounting substrate, the electrode-joining
portion is larger than the semiconductor element electrode portion.
