Effects of the Dielectric Layer on a Planar and a Coplanar Discharge Breakdown

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Abstract
There are two influences of a dielectric layer on the breakdown in Paschen's law. The potential difference at the dielectric layer itself enhances the minimum value of firing voltage, while the strong field in the discharge space with a large dielectric constant reduces the firing voltage in a high pressure range. Specially in a coplanar geometry like AC-PDP [S. Sato et al. : IEEE Trans. Electron Devices 23 (1976) 328.], the firing voltage is shown to be higher due to the non-uniformity of the electric field along with the thickness of the dielectric layer.

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