A contact/container photo and etch creates a contact/container opening to provide access to {HEAD ~ the underlying active area} either directly or through {TAIL ~ a conductive plug} 
A contact / container photo and etch creates a contact / container opening to provide access to { HEAD ~ the underlying active area } either directly or through { TAIL ~ a conductive plug }
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 OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL