{HEAD ~ The second electrode} is made of {TAIL ~ an Mg—Ag layer} having a thickness in a range of 170 Å to 200 Å 
is made of
{ HEAD ~ The second electrode } is made of { TAIL ~ an Mg — Ag layer } having a thickness in a range of 170 Å to 200 Å
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH