Sn or Sn alloy plating film, and composite materials with it

PROBLEM TO BE SOLVED: To provide an Sn or Sn alloy plating film that can give excellent maintenance property of a roll and improve productivity by preventing the Sn or Sn alloy plating film from being rubbed or dropped, and to provide a composite material having the plating film. SOLUTION: The Sn or Sn alloy plating film 2 is formed on one surface of a copper foil or a copper alloy foil 1 where a resin layer or a film 4 is laminated, wherein surface roughness Ra of the plating film when a non-contact type surface roughness meter is used is ≥0.5×10 2 nm. COPYRIGHT: (C)2011,JPO&INPIT