A passivation capping layer overlies the ohmic contact and has {HEAD ~ an oxidation rate} that is less than {TAIL ~ the oxidation rate} of the ohmic contact 
is less than
A passivation capping layer overlies the ohmic contact and has { HEAD ~ an oxidation rate } that is less than { TAIL ~ the oxidation rate } of the ohmic contact
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH