Patent ID: 8715821

Claim:
Polymer article having a thin coating on at least one side thereof, comprising a first coating of SiO x C y H z which is either a plasma polymerized tetramethylsilane or a plasma polymerized tetramethylsilane and an oxidizing gas, deposited on the surface on said polymer article, the x value being between 0 and 1.7, the y value being between 0.5 and 0.8, the z value being between 0.35 and 0.6 for said first SiO x C y H z coating and a second coating of SiO x C y H z which is a plasma polymerized tetramethylsilane and an oxidizing gas deposited on the surface of said first coating, the x value being between 1.7 and 1.99, the y value being between 0.2 and 0.7, the z value being between 0.2 and 0.35 for said second SiO x C y H z coating and in that the thickness of said first coating is from about 1 nanometer to about 15 nanometers and in that the thickness of said second coating is from about 10 nanometers to about 100 nanometers, the second coating defining a top surface of the polymer article.