Communication: Rapid micropatterning of polymers on rigid and flexible substrates can be achieved by the method-vacuum-assisted micromolding in capillaries (MIMIC)-introduced here. The Figure shows an oblique-view SEM image of a single hexagonal cell of a pattern produced by vacuum-assisted MIMIC. The use of vacuum reduced the time taken to fill the pattern with UV-curable polyurethane from similar to 30 min to similar to 15 s.