Patent ID: 8591660
Filing Date: 2013-11-26
Classification: B08B,C23G,H01J

Abstract:
1. A process for cleaning the surface of a substrate comprising a material coated with an organic substance, the cleaning process comprising: introducing said substrate into a treatment chamber, having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90% oxygen by volume; and generating a plasma by passing an electric discharge between the surface of said substrate and a dielectric-covered electrode, breaking down said organic substance through the action of the free radicals O inducing re-dissociation, by applying UV radiation of a suitable wavelength, of the oxygen and/or ozone molecules that are formed by recombination of the free radicals O wherein the cleaning operation comprises breaking down said organic substance on the substrate using the plasma and inducing re-dissociation of the recombined free radicals O wherein said cleaning operation is performed before coating the substrate with an organic or metallic coating, and wherein the UV radiation induces the oxygen and/or ozone molecules produced away from cold arcs of the plasma, to dissociate the ozone into a molecular oxygen and a free radical O