{TAIL ~ An electrical insulation} is formed between {HEAD ~ the first region} and the second region of the semiconductor layer 
{ TAIL ~ An electrical insulation } is formed between { HEAD ~ the first region } and the second region of the semiconductor layer
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH