Patent ID: 6729925
Filing Date: 2004-05-04
Classification: H01J

Abstract:
A method for manufacturing a discharge tube, the discharge tube comprising a discharge part, a sealing part formed at an end of the discharge part, and an electrode provided in the discharge part, the method comprising:inserting an electrode body having the electrode into a portion to be the sealing part that is adjacent to a portion to be the discharge part of a transparent insulating tube serving as a material for the discharge tube; and sealing the portion to be the sealing part by heating and softening with a combination of a laser beam and a gas burner, thus forming the sealing part, wherein immediately before or after completion of sealing an end of the portion to be the sealing part on a side of the portion to be the discharge part by heating and softening with the laser beam, a region that is adjacent to the heated and softened region of the portion to be the sealing part starts being heated and softened with the gas burner.