The PDMS wafer casting process (a) laser cut jigs, (b) the assembled jig, (c) PDMS introduction onto the jig, (d) smoothing of PDMS with foil, (e) PDMS and jig ready for curing, (f) lifting of the foil from cured PDMS, (g) cutting of the parts from the jig, and (h) the final PDMS part.