{HEAD ~ a second series} of {TAIL ~ laser drilled wells}, having a second spacing are made in the substrate material to form the remaining portion of the perimeter of the irregular shaped substrate 
of
{ HEAD ~ a second series } of { TAIL ~ laser drilled wells } , having a second spacing are made in the substrate material to form the remaining portion of the perimeter of the irregular shaped substrate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH