The silicide from the source junction moves toward the drain junction through {HEAD ~ the channel} as {TAIL ~ a result} of the electromigration 
The silicide from the source junction moves toward the drain junction through { HEAD ~ the channel } as { TAIL ~ a result } of the electromigration
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH