The angled surfaces of {TAIL ~ the gate electrodes} can be protected using a liner layer that can extend {HEAD ~ the length} of the contact window to define the sidewalls of the contact window 
The angled surfaces of { TAIL ~ the gate electrodes } can be protected using a liner layer that can extend { HEAD ~ the length } of the contact window to define the sidewalls of the contact window
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH