Because the protective sheet is not cut by {HEAD ~ dicing}, {TAIL ~ no scraps} of the protective sheet is produced, thereby preventing contamination to the chips 
Because the protective sheet is not cut by { HEAD ~ dicing } , { TAIL ~ no scraps } of the protective sheet is produced , thereby preventing contamination to the chips
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH