A switch includes: a housing having a box shape; a plunger movable in a first direction intersecting an opening surface; and a movable piece arranged inside the housing and is elastically deformable in a second direction intersecting the first direction. The plunger has a touching portion which is arranged so as to face the movable piece in the second direction inside the housing and to be able to elastically deform the movable piece in the second direction by touching the movable piece, and further, a lubricant retaining portion that can retain a lubricant is provided in at least one of the touching portion of the plunger and a touched portion of the movable piece.

An electrical contact device includes a high electric potential-side contact and a low electric potential-side contact having a lower electric potential than the high electric potential-side contact. The high electric potential-side contact and the low electric potential-side contact are configured to be brought into and out of contact with each other. At least one of the high electric potential-side contact and the low electric potential-side contact is formed of a low-boiling point material whose boiling point is lower than 2562° C. or a mixed material that contains the low-boiling point material.

A switch includes: a housing having a box shape; a plunger movable in a first direction intersecting an opening surface; and a movable piece arranged inside the housing and is elastically deformable in a second direction intersecting the first direction. The plunger has a touching portion which is arranged so as to face the movable piece in the second direction inside the housing and to be able to elastically deform the movable piece in the second direction by touching the movable piece, and further, a lubricant retaining portion that can retain a lubricant is provided in at least one of the touching portion of the plunger and a touched portion of the movable piece.

An electrical contact device includes a high electric potential-side contact and a low electric potential-side contact having a lower electric potential than the high electric potential-side contact. The high electric potential-side contact and the low electric potential-side contact are configured to be brought into and out of contact with each other. At least one of the high electric potential-side contact and the low electric potential-side contact is formed of a low-boiling point material whose boiling point is lower than 2562 C. or a mixed material that contains the low-boiling point material.

A microelectromechanical system (MEMS) switch with liquid dielectric and a method of fabrication thereof are provided. In the context of the MEMS switch, a MEMS switch is provided including a cantilevered source switch, a first actuation gate disposed parallel to the cantilevered source switch, a first drain disposed parallel to a movable end of the cantilevered source switch, and a liquid dielectric disposed within a housing of the microelectromechanical system switch.

A microelectromechanical system (MEMS) switch with liquid dielectric and a method of fabrication thereof are provided. In the context of the MEMS switch, a MEMS switch is provided including a cantilevered source switch, a first actuation gate disposed parallel to the cantilevered source switch, a first drain disposed parallel to a movable end of the cantilevered source switch, and a liquid dielectric disposed within a housing of the microelectromechanical system switch.