Patent ID: 8012600

Claim:
A material for electric sliding contact, comprising, on a conductive substrate, a first layer composed of a noble metal or an alloy comprising the noble metal as a major component, with an arithmetic average roughness Ra of (A) μm, and, as an upper layer of the first layer, a second layer composed of a noble metal or an alloy comprising the noble metal as a major component, with a covering thickness of from 0.001×(A) μm or more to (A) μm or less, and wherein the noble metal forming the second layer or the noble metal as a major component of the alloy forming the second layer is a different element from the noble metal forming the first layer or the noble metal as a major component of the alloy forming the first layer; wherein the average roughness Ra is in the range of from 0.05 to 0.5 μm.