Also, it provides for {HEAD ~ improved accuracy} in controlling the extend of impurity species concentration and {TAIL ~ the extent} of its penetration into the cyrstalline structure so that resulting diffusion profiles in such structures can be systematically reproduced 
in controlling
Also , it provides for { HEAD ~ improved accuracy } in controlling the extend of impurity species concentration and { TAIL ~ the extent } of its penetration into the cyrstalline structure so that resulting diffusion profiles in such structures can be systematically reproduced
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH