The Temple of Amenhotep III at Thebes. Excavation and conservation at Kom El Hettan. Third report on the fifth season in winter 2002/2003

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Hydrogenated amorphous carbon film coating of PET bottles for gas diffusion barriers

16th European Conference on Diamond, Diamond-Like Materials, Carbon Nanotubes, and Nitrides, Toulouse, FRANCE, SEP 11-16, 2005International audienceThe addition of a gas-impermeable coating on the inside wall of a standard polyethylene tereplithalate (PET) bottle has long been considered as a way to improve the packaging for beer, juice and carbonated soft drinks. We have developed a plasma-assisted deposition process suitable for the deposition of 100 nm thick, transparent, hydrogenated amorphous carbon (a-C:H) films on PET surfaces. The Sidel plasma technology uses an acetylene gas precursor and a microwave plasma, which allows us to obtain a high deposition rate of 60 nm/s necessary for industrial process flows. The a-C:H films provide a 50-fold reduction of the permeation rates Of O-2 . The composition, optical, structural and defect properties of the a-C:H films were characterized by Rutherford Back Scattering (RBS), Elastic Recoil Detection Analysis (ERDA), X-ray Photoelectron Spectroscopy (XPS), optical spectroscopy, Raman and Electron Paramagnetic Resonance (EPR). (c) 2005 Elsevier B.V. All rights reserved