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