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