Patent ID: 8795019
Filing Date: 2014-08-05
Classification: H01J

Abstract:
1. A manufacturing method of an electrode mount for a high pressure discharge lamp, the manufacturing method comprising: 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 an 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, and wherein the oxidation process includes determining an intensity of a laser such that the oxidation portion is formed on an entire peripheral surface of the electrode shaft portion by irradiating one side of the electrode shaft portion with the laser.