The channel walls depend from {HEAD ~ the panel} to define {TAIL ~ a channel} between the channel walls and the panel for receiving a semiconductor therein 
to define
The channel walls depend from { HEAD ~ the panel } to define { TAIL ~ a channel } between the channel walls and the panel for receiving a semiconductor therein
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH