In this exemplary embodiment, the predetermined process temperature of the second annealing process is preferably and substantially between {HEAD ~ 800 C} and {TAIL ~ 900 C} 
In this exemplary embodiment , the predetermined process temperature of the second annealing process is preferably and substantially between { HEAD ~ 800 C } and { TAIL ~ 900 C }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL