SEALED ELECTRIC CONTACT MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive sealed electric contact mateical with which sticking between contact points is hardly caused by successively forming a lower part coating layer consisting of Ag or Cu and a upper part coating layer consisting of In or Zn on a contact substrate. SOLUTION: A coating layer is divided into two layers consisting of a lower part and an upper part and the lower part coating layer (in the substrate side) is 0.1μm thick or thicker and made of Cu or Ag to stabilize the contact resistance and at the same time to heighten the adhesion strength between the upper part coating layer and the substrate and the upper part coating layer (in the surface side) 0.1μm thick or thicker and made of In to suppress the sticking property between contact points. The reason for the 0.1μm or larger thickness is because both layers are not provided with sufficient effects in the case it is 0.1μm thick or thicker.