| 摘要 |
PURPOSE:To manufacture the airtight terminal characterized by excellent airtightness by forming a copper plated layer at least on the inner surface of a pipe lead, and then crushing one end thereof to obtain a flat shape, and airtightly blocking the crushed flat part by copper braze. CONSTITUTION:The copper plated layer 14 is formed over the entire surface of the pipe lead 13. Then, one end thereof is compressed and the crushed flat part 15 is formed. Then the exposed layer 14 is separated. Thereafter the heating is performed up to the temperature higher than the melting point of the layer 14, and the layer 14 is fused and the copper braze 16 is obtained. The flat part 15 is blocked airtightly by said copper braze 16. Then, by using a sealing jig 17, the pipe lead 13 is assembled at a specified position together with a metallic outer ring 11 and a sintered glass doublet 12a. The outer ring 11 and the pipe lead 13 are sealed airtightly via glass 12. Thus, the airtight terminal characterized by excellent airtightness can be readily manufactured. |
