| 摘要 |
PROBLEM TO BE SOLVED: To provide a vacuum valve of high productivity, low cost and high reliability which does not generate corona discharge, and its manufacturing method. SOLUTION: With the vacuum valve applied with a heat stress alleviating member so as to cover a part needing alleviation of heat stress on a resin- molded outer periphery of a vacuum vessel, the heat stress alleviating member is a conductive heat stress alleviating member. Also, the heat stress alleviating member is molded for mounting in advance in a ring shape which can be mounted on the outer periphery of the vacuum vessel by elasticity.
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