Using a laser, a first series of laser drilled wells, having a first spacing, are made in the substrate material to define {HEAD ~ a substantial portion} of {TAIL ~ the perimeter} of the irregular shaped substrate 
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Using a laser , a first series of laser drilled wells , having a first spacing , are made in the substrate material to define { HEAD ~ a substantial portion } of { TAIL ~ the perimeter } of the irregular shaped substrate
OTH OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH