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