The invention provides a pitted-surface
metal and rubber composite conductive particle, which is formed by adhering a
metal surface layer to a rubber basic body or slitting after adhesion, wherein the
metal surface layer is a pitted surface and has pits or bumps or both the pits and the bumps; the pits or the bumps are formed on an external surface of the metal
surface layer or an internal surface or both the external surface and the internal surface; the depths of the pits are smaller than the thickness of the metal surface layer; the heights of the bumps are greater than or equal to one tenth of the thickness of the metal surface layer; the metal surface layer is made of metal or
alloy; gold, silver,
copper or
nickel can be coated on the external surface of the metal surface layer; the rubber basic body is made of
silicon rubber or
polyurethane rubber; an adhesion layer can be arranged between the metal surface layer and the rubber basic body; the adhesion layer is made of a heat
vulcanization adhesive, a prime
coating agent or a material which is the same as that of the rubber basic body; and aids such as a
coupling agent can be coated on the internal surface of the metal surface layer. The metal surface layer is high in strength, stable in
conductivity, high in strength of the adhesion layer and high in elasticity of the rubber basic body; and the pitted-surface metal and rubber composite conductive particles can serve as conductive parts of various kinds of keys of a
mobile phone, an automobile and the like, and the cost can be controlled.