In such a case, two word lines are separated only by a connecting channel that enables {HEAD ~ an electrically conductive connection} between a trench filling of {TAIL ~ the trench capacitor} and a bit line 
In such a case , two word lines are separated only by a connecting channel that enables { HEAD ~ an electrically conductive connection } between a trench filling of { TAIL ~ the trench capacitor } and a bit line
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 OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH