If exposure of all of {TAIL ~ the pattern portions} of {HEAD ~ the die} are successfully completed, then processing is terminated 
If exposure of all of { TAIL ~ the pattern portions } of { HEAD ~ the die } are successfully completed , then processing is terminated
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH