Patent ID: 7166336
Filing Date: 2007-01-23
Classification: C23C

Abstract:
1. An apparatus for producing DLC film-coated plastic containers having a bottom portion, a body portion which is located above said bottom portion, and a shoulder portion which is located above said body portion, comprising an outer electrode unit disposed outside a plastic container, an inner electrode disposed inside said plastic container, a vacuum unit for reducing the inner pressure of the plastic container, a gas feeding unit for feeding a raw material gas of a carbon source into said plastic container which has been placed under a vacuum by said vacuum unit, and a power source unit for applying a voltage between the outer electrode unit and the inner electrode while a carbon source gas is fed into the container, thereby to generate plasma to form a DLC film on an inner surface of the plastic container; wherein the outer electrode unit comprises a first outer electrode disposed along the bottom portion of the plastic container, a second outer electrode disposed along the body portion of the plastic container, and a third outer electrode disposed along the shoulder portion of the plastic container, resistive element or capacitive elements are interposed between each of the outer electrodes, to prevent the flow of direct electric current and seal the outer electrodes, and an output terminal of a high frequency oscillator is connected to only the first outer electrode via a matching transformer.