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