Electrical connection member material and electrical connection member
It is aimed to provide an electrical connection member material and an electrical connection member capable of suppressing adhesion in an Ag layer even without using a special metal layer. An electrical connection member material 1 is provided with a metal material 10 including an Ag layer 13 on a surface, a surface hardness of the Ag layer 13 being 90 HV or more, and a coating layer 2 for covering the surface of the metal material 10 . The coating layer 2 is formed by bringing an organic compound having a mercapto group into contact with the surface of the metal material 10 . Further, an electrical connection member includes the electrical connection member material 1.
1 . An electrical connection member material, comprising:
a metal material having an outermost surface that includes a silver (Ag) layer, the Ag layer having a surface hardness of 90 HV or more; and
a coating layer contacting and covering the outermost surface of the metal material, the coating layer constituted by an organic compound having a mercapto group,
wherein the coating layer is formed by bringing the organic compound and an aromatic ring into contact with the outermost surface of the metal material.
2 . The electrical connection member material according to claim 1 , wherein the aromatic ring is a hetero ring containing at least one of a sulfur (S) atom and a nitrogen (N) atom in addition to a carbon (C) atom.
3 . An electrical connection member, comprising the electrical connection member material according to claim 1 .
4 . The electrical connection member according to claim 3 , wherein:
the electrical connection member is configured as a connection terminal including a contact point portion to be brought into electrical contact with a mating electrically conductive member, and
the coating layer is formed on the outermost surface of the metal material at least in the contact point portion.
5 . The electrical connection member according to claim 4 , wherein a surface pressure to be applied to the contact point portion is 30 MPa or more.
6 . The electrical connection member material according to claim 1 , wherein
the Ag layer contains an additive element for hardening the Ag layer, in addition to silver (Ag) and unavoidable impurities, and
the additive element is one of selenium (Se), carbon (C), and sulfur (S).
7 . The electrical connection member material according to claim 1 , wherein the metal material further includes:
a base material configured as a metal plate material of copper (Cu) or Cu alloy, and
an underlayer provided between the base material and the Ag layer, the underlayer composed of at least one layer made of nickel (Ni) or Ni alloy.
8 . The electrical connection member material according to claim 7 , wherein the at least one layer comprising the underlayer includes two or more types of laminated metal layers.