The semiconductor material comprising substrate 10 may include an optional epitaxial layer on a bulk substrate, such as an epitaxial layer comprised of {TAIL ~ lightly doped n type semiconductor material} that defines a top surface 25 and that covers {HEAD ~ an oppositely doped bulk substrate} 
The semiconductor material comprising substrate 10 may include an optional epitaxial layer on a bulk substrate , such as an epitaxial layer comprised of { TAIL ~ lightly doped n type semiconductor material } that defines a top surface 25 and that covers { HEAD ~ an oppositely doped bulk substrate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD