An emitter and an extrinsic base layer are formed in {HEAD ~ respective contacting relationships} with {TAIL ~ the first and second portions} of the intrinsic base layer 
An emitter and an extrinsic base layer are formed in { HEAD ~ respective contacting relationships } with { TAIL ~ the first and second portions } of the intrinsic base layer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH