chemically vapor depositing during said first cycle a substantially optically transparent diamond like carbon outer layer which is transparent to light in the visible region of 350 to approximately 750 nanometers and having a thickness of {HEAD ~ at least 50 A Å thick} onto {TAIL ~ said coated substrate} 
onto
chemically vapor depositing during said first cycle a substantially optically transparent diamond like carbon outer layer which is transparent to light in the visible region of 350 to approximately 750 nanometers and having a thickness of { HEAD ~ at least 50 A Å thick } onto { TAIL ~ said coated substrate }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL