| 摘要 |
PROBLEM TO BE SOLVED: To obtain a case which is hermetically sealed and has high dimensional precision without containing a brazing filler metal, etc., by laying the brazing filler metal, etc., on a joining part, using a high density heat source to melt this metal and joining a vessel body and a cover material. SOLUTION: A notching part 3 is arranged at a part of the inner part on the upper surface of the vessel body 1 and the cover material 2 is fitted to this notching part to ensure the fitting of the cover material 2 to the vessel body 1. A pool part 4 of the brazing filler metal, etc., 6 is arranged surrounding the fitting part on the upper surface of the cover material 2 and the brazing filler metal, etc., 6 is laid on this pool part 4 and the laser beam, etc., from the high density heat source, is directly irradiated to fuse-join the vessel body and the cover material. The leakage of the fused brazing filler metal, etc., 6 to the outer part is prevented with the pool part 4, and the invasion of the fused brazing filler metal, etc., 6 into the inner part of the vessel body 1 is prevented by forming the notching part 3, i.e., the contacting part between the vessel body 1 and the cover material 2 to an L-shape type to take the large distance. Since the contents in the vessel is not made to high temp., the thermal bad effect is not generated. |
