{HEAD ~ The substrate} has a first surface and {TAIL ~ a second surface} spaced in a predetermined interval apart from the first surface is prepared 
{ HEAD ~ The substrate } has a first surface and { TAIL ~ a second surface } spaced in a predetermined interval apart from the first surface is prepared
HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH