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US 2017/0062200 A1Published application
Electrode for a short-arc high pressure lamp
AssigneePhilips Lighting Holding B.V.
InventorOLGA BORISOVNA MINAYEVA
Life of this patent
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Abstract
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.
Claims16
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.
2 more elements
(canceled)
An electrode for a discharge device prepared by a process comprising the steps of:
- masking a side wall portion of the electrode but leaving a tip area of the electrode unmasked;
- and
- implanting a tip area of the electrode with an emissive material dopant,
- wherein the electrode is formed from a material that does not include thoriated tungsten.
1 more element
An electrode for a discharge device prepared by a process comprising the steps of:
- Implanting the electrode with an em material dopant using ion implantation;
- and
- depositing a diffusion barrier on a side wall to cover a portion of the implanted electrode,
- wherein the electrode is formed from a material that does not include thoriated tungsten.
1 more element
Dependencies are inferred from the claim text.