To open/close a large current with a large effective contact area, by including a drive element making two sheets of slide plates slide in a direction parallel to a surface, and sliding the slide plate in a direction arranging a conductor part and an insulation part by the drive element.
A first slide plate 1 comprises a conductive substrate 3 and a diamond contact film 4 formed on this substrate, a second slide plate 2 comprises a conductive substrate 5 and a contact film 6 formed on this substrate, diamond is essentially an insulating material. In order to totally drive the slide plate 2 relating to the slide plate 1, a drive element 30 is provided on the slide plate 1, a side surface of the element 30 is extended together in an end face of the slide plate 2. A conductive part 7, 9 of the contact film 4, 6, when in a position opposed to each other, are placed in a condition closing a switch. Oppositely, the conductive part 7, in the case of coming into contact with a mate side insulation part 10, and the conductive part 9, in the case of coming into contact with a mate side insulation part 8, are placed in a condition opening the switch. A current is interrupted by the insulation parts 8, 10.
