Accordingly, the complementary microstructures may be superimposed in a controlled manner by operation of {HEAD ~ micro alignment means} also formed in the substrate by {TAIL ~ an etching} or similar process 
formed by
Accordingly , the complementary microstructures may be superimposed in a controlled manner by operation of { HEAD ~ micro alignment means } also formed in the substrate by { TAIL ~ an etching } or similar process
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH