For this process, {HEAD ~ a 500 angstrom layer} of chromium is used as {TAIL ~ the seed layer} underneath 5000 angstroms of gold 
is used as
For this process , { HEAD ~ a 500 angstrom layer } of chromium is used as { TAIL ~ the seed layer } underneath 5000 angstroms of gold
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH