The laser beam drills by focusing the energy of {HEAD ~ the laser} onto the substrate material 18 to vaporize or melt the substrate to form {TAIL ~ a blind hole}, or well 
The laser beam drills by focusing the energy of { HEAD ~ the laser } onto the substrate material 18 to vaporize or melt the substrate to form { TAIL ~ a blind hole } , or well
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH