| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently reduce temperature rise of a caliper 5a and a brake fluid against heat generation due to friction between a rotor and a pad in braking. SOLUTION: After applying chemical nickel plating to a surface 10 on the rotor side of the caliper 5a made of an aluminum alloy and to a surface 11 on the side opposite to the rotor, nickel-tungsten alloy plating is applied to both side faces 10 and 11 thereof; next, gold plating is applied to only the surface 10 on the rotor side. By virtue of this structure, the reflectivity of the surface 10 on the rotor side to the incident light is set higher than that of the surface 11 on the side opposite to the rotor to the incident light. COPYRIGHT: (C)2006,JPO&NCIPI
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