It is preferable that {TAIL ~ the colored wafer back surface protective film} has {HEAD ~ a laser} marking ability 
It is preferable that { TAIL ~ the colored wafer back surface protective film } has { HEAD ~ a laser } marking ability
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH