The monocrystalline semiconductor material of {HEAD ~ the substrate} 10 may contain {TAIL ~ a definite defect concentration} and still be considered single crystal 
The monocrystalline semiconductor material of { HEAD ~ the substrate } 10 may contain { TAIL ~ a definite defect concentration } and still be considered single crystal
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH