source and drain regions of a p type diffusion region formed at respective outer sides of said source and drain extension regions as viewed from said channel region, said {HEAD ~ source region} being formed in {TAIL ~ continuation} to said source extension region, said drain region being formed in continuation to said drain extension region; and 
source and drain regions of a p type diffusion region formed at respective outer sides of said source and drain extension regions as viewed from said channel region , said { HEAD ~ source region } being formed in { TAIL ~ continuation } to said source extension region , said drain region being formed in continuation to said drain extension region ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH