removing the sacrificial emitter pedestal to define an emitter window between the non conductive spacers and extending through {HEAD ~ the extrinsic base layer} to {TAIL ~ the first portion} of the intrinsic base layer 
removing the sacrificial emitter pedestal to define an emitter window between the non conductive spacers and extending through { HEAD ~ the extrinsic base layer } to { TAIL ~ the first portion } of the intrinsic base layer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH