| 摘要 |
An x-ray tube is provisionally assembled by interposing an upright part (12A) projecting from a first brazing agent (A) between a stem (3) and a bulb (2), and by interposing a second brazing agent (B) between the bulb (2) and an output window (4). This temporary assembly is conveyed into a vacuum brazing oven (P). Since a gap (K) is provided between the stem (3) and the bulb (2) by the upright part (12A), gas inside the bulb (2) can be discharged through the gap (K). Then, the vacuum brazing oven (P) is heated to a predetermined temperature to melt the first and second brazing agents (A, B), to thus fuse-bondingly fix the stem (3) and the output window (4) to the bulb (2). Brazing connection is completed in the vacuum brazing oven (P) while maintaining the sealed vessel (7) in a high vacuum condition without provision of a discharge pipe in the stem (3). <IMAGE> |
