Alternatively, {TAIL ~ a silicon substrate} may be used instead of {HEAD ~ the substrate} and the oxide layer 
Alternatively , { TAIL ~ a silicon substrate } may be used instead of { HEAD ~ the substrate } and the oxide layer
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH