{HEAD ~ The metallic layer} 29 is obtained by using {TAIL ~ such a conventional technique} as sputtering or thermal evaporation 
is obtained by using
{ HEAD ~ The metallic layer } 29 is obtained by using { TAIL ~ such a conventional technique } as sputtering or thermal evaporation
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH