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We experimentally investigate the magnetic field $B$ dependence of thecritical current I_c and the transition temperature T_c, i.e. the I_c(B)-T_c(B)phase boundary, of superconducting niobium thin films patterned with periodicand quasiperiodic antidot arrays on the submicron scale. For this purpose wemonitor current-voltage characteristics at different values of B and T. Weinvestigate samples with antidots positioned at the vertices of two differenttilings with quasiperiodic symmetry, namely the Shield Tiling and the TuebingenTriangle Tiling. For reference we investigate a sample with a triangularantidot lattice. We find modulations of the phase boundary for bothquasiperiodic tilings, which were predicted by numerical simulations but notobserved in experiments yet. The particularity of these commensurabilityeffects is that they correspond to excess flux densities, which are slightlyhigher than the matching flux. The observed matching effects can be explainedby quasiperiodic caging of interstitial vortices and/or the formation ofsymmetry induced giant vortices.

Excess flux stability fingerprints in the I_c(B)-T_c(B) phase boundary of superconducting thin films with quasiperiodic microtopology