  The spontaneous breakdown of the scale, the chiral and the superconformal
symmetries for a hidden $SU(N)$ gauge group is studied in an effective
lagrangean approach. The relevant low-energy degrees of freedom are taken to be
the composite Goldstone particles associated with these three broken
symmetries. Supersymmetry is spontaneously broken in the large $N$ limit and
soft breaking terms in the observable sector are generated, together with
nonrenormalisable Nambu-Jona-Lasinio type interactions.
