A dust-collecting electrode where at least one unit electrode between the unit electrodes facing each other includes: a ceramic dielectric body, a surface conductor disposed so as to cover at least a part of the surface of the ceramic dielectric body on the side where the unit electrodes face each other,...http://www.google.es/patents/US7431755?utm_source=gb-gplus-sharePatente US7431755 - Dust-collecting electrode and dust collector
