Patent ID: 7008596

Claim:
A device to generate a plasma for the production of ozone and/or oxygen ions in the air, based on the principle of dielectrically impeded discharge, with two electrodes ( 3 , 4 ) to which a high voltage from an alternating voltage generator is applied and between which an electrically insulating element is situated, wherein a) the element consists of a flat, electrically insulating carrier ( 1 , 7 ), whose material has a dielectric constant ε r carrier which is greater than 50 (in words, ε r carrier >fifty) or at least greater than 30 (in words, ε r carrier >thirty), b) a flat electrode ( 4 ), as a lower electrode ( 4 ), made of an electrically conductive material, is applied onto a rear one of main surfaces of the carrier ( 1 , 7 ), c) at least one electric insulating layer ( 2 , 8 ) made of a dielectric material is applied onto the other main surface of the carrier ( 1 , 7 ), the front, which is adapted to be exposed to air, wherein the insulating layer ( 2 , 8 ) only partially covers the front of the carrier ( 1 , 7 ), d) the dielectric constant of the carrier ( 1 , 7 ) and that of the insulating layer ( 2 , 8 ) are different, wherein, at a dielectric constant of the carrier ( 1 , 7 ) of ε r carrier >fifty, the dielectric constant of the insulating layer ( 2 , 8 ) is between 50>ε r insulating layer >5 and, at a dielectric constant of the carrier ( 1 , 7 ) of ε r carrier >thirty, the dielectric constant of the insulating layer ( 2 , 8 ) is between 30>ε r insulating layer >5, for allowing a mirror discharge effect to occur, and e) a band-shaped electrode ( 3 , 10 ), as an upper electrode ( 3 ), made of an electrically conductive material that only partially covers the insulating layer ( 2 , 8 ), is directly situated on the insulating layer ( 2 , 8 ).