ELECTRODE FOR A SHORT-ARC HIGH PRESSURE LAMP

摘要

An electrode (1) of a discharge device (e.g. the cathode of a discharge lamp) having a side area (4) and a tip area (5) implanted with an emissive material dopant induced by ion implantation is disclosed. The side area (4) of the electrode (1) may be masked (3) during ion implantation or a diffusion barrier layer (7) may be added on the side area (4) after ion implantation.

主权项

1. A discharge lamp comprising:
an anode; and a cathode including a side area and a tip area having an emissive material dopant induced by ion implantation, a diffusion barrier covering the side area, and wherein said cathode is made from a material that does not include thoriated tungsten.