A semiconductor device wherein return wires corresponding to a plurality of fuse wires are arranged collectively in the same region. The heterodyne interferometer includes an acoustic-optical modulator that can superimpose a RF signal on a source signal, and output a zero order beam and a higher order beam. Second, the device blocks the small amount of reference beam that is incident on the diffuser and reflects back toward the film. The request of a update is refused when judged that the update of the user key data concerning the shown medium identifier IDm being performed within a predetermined period. The balloon accommodating portion permits inflating of the balloon to a predefined volume.