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