  We report a giant inverse proximity effect that arises in the low-dimensional
devices and is crucially different from proximity in the standard
superconductor-normal-superconductor (S/N/S) junctions. The normal conductors
induce a giant back-action on the proximity superconducting regions even when
the dimensions of the normal parts are smaller than the proximity coherence
length. This essentially suppresses the superconducting characteristics of the
entire system, including the critical current, well below those for the usual
S/N/S structures.
