Discharge lamp with dielectrically inhibited electrodes

US6566810B1 · kind B1 · utility

Assignee

• Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

• Michael Seibold · Schwäbisch Gmünd, DE
• Michael Ilmer · Augsburg, DE
• Angela Eberhardt · Augsburg, DE

Key dates

• Filing date: May 18, 2000
• Grant date: May 20, 2003
• Expiry date: May 18, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J61/04
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A discharge lamp, suitable for operating by means of a dielectrically impeded discharge, and having metal electrodes arranged on the wall of the discharge vessel has at least one dielectric impeding layer which covers at least a portion of the electrodes. According to the invention, the electrodes are additionally covered directly with a barrier layer, in particular made from sintered glass ceramic, that is to say the barrier layer is, if appropriate, respectively arranged between the electrode and the dielectric impeding layer. The result of this is to prevent metal ions from diffusing out of the electrodes into the dielectric impeding layer and undesirably influencing the properties thereof. Moreover, it is possible in this way to prevent the electrode tracks from evaporating or being sputtered away during operation of the lamp.