| abstract |
Described is an article comprising a substrate and a coating comprising plasma-polymer, silicon, oxygen and carbon, which is surface-bonded to the substrate and for which the following applies when determined by means of ESCA: The molar ratio O: Si is> 1.25 and <2.6 and the molar ratio C: Si is> 0.6 and <2.2, According to a preferred embodiment, the coating contains, based on its total atomic number, without hydrogen and / or fluorine - a minimum of 22 and a maximum of 27 atomic percent Si, - a minimum of 25 and a maximum of 50 atomic percent O and - a minimum of 25 and a maximum of 50 atomic percent C. |