Electrode mount, high pressure discharge lamp using the same, and manufacturing methods of electrode mount and high pressure discharge lamp
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United States of America Patent
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Aug 5, 2014
Grant Date -
Nov 15, 2012
app pub date -
Jun 28, 2011
filing date -
Sep 14, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
To prevent bending of an electrode shaft portion by a method which requires minimum increase in production cost, in an electrode mount for a high pressure discharge lamp. A manufacturing method of an electrode mount for the high pressure discharge lamp includes: a process of subjecting the electrode mount to a heat treatment, the electrode mount including an electrode and a metal foil which are welded to each other; and an oxidation process of producing an oxide on a surface of the electrode shaft portion of the electrode by laser irradiation to form an oxidation portion on the surface, wherein a laser irradiation position is determined such that a whole or part of the oxidation portion is included in a sealing portion of the high pressure discharge lamp when the electrode mount is embedded in the sealing portion.
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