An electrode is a electrically conductive component. Between an electrode and a second conductive component, usually a second electrode, an electric field establishes when beeing charged by an electric voltage.
Such an electric field can stimulate a plasma by one of the following methods.
- By high voltage and extreme concetration of the electric field a plasma can be generated. This is the common process to generate an atmospheric plasma.
- By an oscillating electric field a plasma can be generated caused by high frequency instead of high voltage. This method is used to generate low pressure plasma. Electrodes can have big distances. By this method a homogenous plasma in a large volume can be generated.