| 摘要 |
<P>PROBLEM TO BE SOLVED: To preserve micronization of arc-proof components, starting from manufacturing of a contact, until completion of assembly of a vacuum valve and to achieve enhancement of voltage resistance characteristics. <P>SOLUTION: A vacuum valve has a pair of contacts 5 and 6 that is freely brought into contact with each other and separated from each other. The pair of contacts 5 and 6 is constituted of: base material layers 5a and 6a formed by mixing predetermined quantities of conductive components and arc-proof components; first fine layers 5b and 6b that have first micronized arc-proof components micronized by energy irradiating the arc-proof components while being formed on surfaces of the base material layers 5a and 6a; and second fine layers 5c and 6c that have second micronized arc-proof components micronized by executing current conditioning treatment of the first micronized arc-proof components while being formed at random on surfaces of the first fine layers 5b and 6b. <P>COPYRIGHT: (C)2013,JPO&INPIT |
