Patent ID: 8961688
Filing Date: 2015-02-24
Classification: B05D,B08B,B29C,B29K,B65D,B65G,C08J,C23C,H01J

Abstract:
1. Device for the plasma treatment of workpieces, which has at least two plasma chambers which can be evacuated, each of the plasma chambers being configured for receiving a workpiece, wherein the plasma chambers are located in the area of a treatment station, and in which each of the plasma chambers is bounded by a chamber floor, a chamber lid, and a lateral chamber wall and has at least one mounting element for positioning the workpiece, wherein the lateral chamber wall is movable vertically relative to the chamber floor, wherein at least two plasma chambers ( 17 ) are connected to at least one junction ( 55 ) for splitting a stream of an operating agent into at least two split streams, wherein the plasma station ( 3 ) is designed for coating the interior of workpieces ( 5 ) that are formed as a hollow plastic bottles arranged vertically in the plasma station with a mouth of the bottles directed downwardly, wherein the one or more plasma stations ( 3 ) are supported by a rotating plasma wheel ( 2 ), wherein the at least one junction ( 55 ) is connected to a primary vacuum valve ( 60 ) for connecting a first negative pressure, and wherein the at least one junction ( 55 ) is connected to a secondary vacuum valve ( 61 ) for connecting a lower negative pressure relative to the first negative pressure, wherein the at least one junction ( 55 ) connected to the secondary vacuum valve ( 61 ) is located in the area of a chamber base ( 30 ) for supplying the negative pressure to the interior of each of the plasma chambers that surrounds the workpiece, wherein at least one further junction ( 55 ) is connected to at least one process gas feed that provides process gas needed for producing a coating by precipitating SiO x , one junction opens into the interior of the workpieces and another junction opens into the interior of the plasma stations, wherein a negative pressure source for providing the lower negative pressure is connectable with the interior of the workpieces via the at least one junction so as to provide a vacuum of from 0.1-0.3 mbar, wherein the chamber base is fixed relative to the plasma stations, wherein at least one junction ( 55 ) is connected to a workpiece ventilation valve ( 64 ) for connecting the interior of the workpieces ( 5 ) to ambient pressure.