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