the present invention provides a ballast circuit and method for fabricating the same for multi - electrode corona discharge arrays . the circuit includes a conductive plastic material and at least one corona electrode protruding from the conductive plastic material . the distance between the plastic material and the corona electrode varies and controls the electrical resistance and determines the voltage breakdown of the circuit . additionally , a particle collection surface may preferably be located within the conductive plastic material or preferably be separated from the material depending on the circuit design and configuration .