Since {TAIL ~ the second diffused layer} has {HEAD ~ a high concentration}, the short channel effect can be suppressed 
Since { TAIL ~ the second diffused layer } has { HEAD ~ a high concentration } , the short channel effect can be suppressed
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH