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