Patent ID: 6827972
Filing Date: 2004-12-07
Classification: B05D,B65D,C23C,H05H,Y10T

Abstract:
A method using a plasma excited by an electromagnetic wave to form a container made heterogeneously from a material with a barrier effect and a polymer material forming a substrate conforming to the shape of said container to be produced, wherein said polymer material forming the substrate is coated with a material with a barrier effect comprising an amorphous carbon material with a polymer tendency, comprising the following steps:placing a container blank (18) made from a polymer material forming the above-mentioned substrate in an enclosure (2), in which a vacuum is created, injecting at least one carbon precursor into the container blank (18) which constitutes a reaction chamber (18) at the same time as a vacuum is created inside said blank and a vacuum is simultaneously created into the enclosure in order to reduce the pressure differential between the interior and the exterior of the blank, said carbon precursor being injected in the gaseous state at a pressure of less than 10 mbar, the precursor being selected from the group consisting of alkane compounds, alkene compounds, alkyne compounds, aromatic compounds, and a combination of two or more thereof, and simultaneously electromagnetically exciting a microwave in the UHF range in the container blank, at a relatively low power sufficient to generate a plasma in the interior of the blank only, such plasma being under temperature conditions which will maintain the polymer material forming the substrate at a temperature below its glass transition temperature on the one hand and which will cause an amorphous carbon material with a polymer tendency to be deposited on the interior surface of the container blank on the other hand, wherein said amorphous carbon material with a polymer tendency is a material wherein CH3, CH2, and CH bonds are in the proportions of 25, 60, and 15, respectively, and the proportions of the electronic states sp3, sp2, and sp are 53, 45, and 2, respectively.