The wavelength is short enough to produce desired {TAIL ~ short wavelength benefits} of small spot size, tight tolerance and {HEAD ~ high absorption}, but not so short so as to cause microcracking 
The wavelength is short enough to produce desired { TAIL ~ short wavelength benefits } of small spot size , tight tolerance and { HEAD ~ high absorption } , but not so short so as to cause microcracking
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH