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