PHOTOMULTIPLIER TUBE AND PRODUCTION METHOD THEREFOR

摘要

A bypass (2), a light receiving plate and stem plate form a sealed container for a photomultiplier tube. The bypass is formed by combining a plurality of warped-up frames (80). End faces (81a) each positioned correspondingly to each corner (81) at an opening end face on the light receiving plate side of the bypass are positioned higher than other end face portions (80a). On heating, the end faces (81a) are buried deep into the light receiving plate to enhance the joining between the bypass (2) and the light receiving plate. In addition, the entire opening on the light receiving plate side of the bypass (2) is buried in the light receiving plate to thereby ensure the joining between the bypass (2) and the light receiving plate and enhance a yield at the joining work. A resulting improved integration of the bypass (2) with the light receiving plate increases an air-tightness of the sealed container.