| 摘要 |
PURPOSE:To simplify construction and prevent an inner body of an enclosure from being damaged by a method wherein one side opening part of an outer body and the inner body of the enclosure and a cover are joint together in a high temperature atmosphere and the pressure in a space region enclosed by the enclosure inner body and the cover is reduced below the atmospheric pressure. CONSTITUTION:Along the opening part 4 where an enclosure outer body 2 and the enclosure inner body 3 are joint together, a cylindrical cover 15 is airtightly jointed to the opening part 4 of both and the space region 16 enclosed by the enclosure inner body 3 and the cover 15 is decompressed below the atmospheric pressure. For instance, when joining the cover 15 to the opening part 4 with glass frit 5, the pressure in the space region 16 can be reduced to about 1/3 in the high temperature atmosphere of 500 deg.C. Thereby construction is simple and manufacture can be simplified while preventing the enclosure inner body from being damaged. |
