Switch and method for manufacturing the same, and relay

摘要

To smoothly form the contacting surfaces of the contacts and to reduce the contact resistance between the contacts such that the contacts reliably contact each other. The fixed contact portion (33) has an adhesion layer (43) and a wiring layer (44) stacked on a fixed contact substrate (41) and a contact layer (45) formed thereon. An end face that faces a movable contact portion (34) of a contact layer (45) becomes a fixed contact (46) (contacting surface), and the fixed contact (46) projects out from the wiring layer (44) and the adhesion layer (43), as well as the fixed contact substrate (41). The movable contact portion (34) has the adhesion layer (53) and the wiring layer (54) formed on the movable contact substrate (51) and the contact layer (55) formed thereon. An end face that faces the fixed contact portion (33) of a contact layer (55) becomes a movable contact (56) (contacting surface), and the movable contact (56) projects out from the wiring layer (54) and the adhesion layer (53) as well as the fixed contact substrate (51). The fixed contact and the movable contact are surfaces coming into contact with the side surfaces of the mold portion (A2) in the step of growing the contact layers (45, 55) through vapor deposition, sputtering, and the like.