Patent ID: 8603632

Claim:
An article comprising: a thermoplastic and an adherent diamond like carbon coating on one or more surfaces of said thermoplastic, the adherent diamond like carbon coating being a doped diamond like carbon that further comprises 8.1 atomic percent or more of oxygen and 9.7 atomic percent or less of nitrogen, said adherent diamond like carbon coating has a permeability coefficient for helium gas that is at least 10 times less than the permeability coefficient for helium of said thermoplastic, the diamond like carbon coating has a surface resistivity of from about 10 7 to about 10 14 ohm/square and said adherent diamond like carbon coating has a transmittance that is 0% to 70% less than the transmittance of said thermoplastic to light in the range of 300 nm to 1100 nm.