| 摘要 |
PURPOSE:To improve the air-tightness and to prevent the variation of the appearance and the dimension, by making a through-hole in the recess of the sealing board and after inserting the generating element and brazing between the ceramic ring and the sealing board sealing said through-hole with the brazing material. CONSTITUTION:The metal galvanized layer is formed on the seal boards 6, 7 to be used as the negative and positive terminal boards, while the metalized layer and the metal galvanized layer are formed on the ceramic ring 5 and a through- hole 17 is made in the recess 6a at the circumference of the sealing board 6. Then the brazing material 9 is arranged at the circumference of the sealing board 7 to be pressurized and heated thus to perform the soldering, and after inserting the generating element the sealing board 6 is mounted through the brazing material 8 to be pressurized and heated to perform the soldering. Thereafter the through-hole 17 is sealed with the brazing material. Since it is sealed while the inner gas is exhausted sufficiently through the through-hole 17 the deterioration of the appearance and the variation of the dimension can be prevented. |
