{TAIL ~ The contact} is made by etching the film with an acidic solution and thereafter treating the etched surface with {HEAD ~ an alkaline solution} 
{ TAIL ~ The contact } is made by etching the film with an acidic solution and thereafter treating the etched surface with { HEAD ~ an alkaline solution }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD