The presence of traps in the insulator allows {HEAD ~ the capture} of some of the minority carriers causing {TAIL ~ a charge} to be built up in the insulator which reduces the effective field in the insulator which reduces the effective field in the semiconductor caused by the gate electrode potential 
causing
The presence of traps in the insulator allows { HEAD ~ the capture } of some of the minority carriers causing { TAIL ~ a charge } to be built up in the insulator which reduces the effective field in the insulator which reduces the effective field in the semiconductor caused by the gate electrode potential
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH