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