| 摘要 |
PROBLEM TO BE SOLVED: To enable the permeation of only hydrogen gas, and shut off the permeation of electrolyte, steam, etc., by equipping a part of the case to accommodate each kind of element with a gas permeation part consisting of a ceramic porous body whose average pore specified. SOLUTION: The base 1 of fine ceramics is equipped with a storage 1a, and a case for electronic parts is constituted of the base 1 and a cap 2 entirely made of porous ceramics. Here, it will do to make the cap 2 out of fine ceramics, and also make its one part serve as the gas permeating part of porous ceramics. An electrolytic capacitor is stored in the storage 1a of the base 1, and an electrode terminal for connection is led out to the external terminal at the bottom surface from the through hole of the base 1, and further the cap 2 is joined for sealing to the topside of the base 1 through sheet material such as glass or the like. The communication pore of the porous ceramics is 0.01-2μm in average diameter, and hydrogen gas permeates it, but it can shut off the permeation of the steam. Accordingly, it can let the hydrogen gas generated at excessive currents go outside, and prevent the permeation of steam from outside.
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