{HEAD ~ A third dielectric layer} covers the second array of wordlines and {TAIL ~ exposed portions} of the second dielectric layer 
covers
{ HEAD ~ A third dielectric layer } covers the second array of wordlines and { TAIL ~ exposed portions } of the second dielectric layer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH