Conductor for flexible substrate and fabrication method of same, and flexible substrate using same

摘要

A conductor for a flexible substrate, used for a flexible flat cable or disposed inside a flexible printed-circuit board, according to the present invention comprises: a base conductor made of Cu or Cu-alloy; a plating film made of Sn or Sn-alloy formed on a surface of the base conductor; and a surface oxide film formed on a surface of the plating film, in which the surface oxide film includes oxide of an element other than Sn or a mixture of Sn oxide and oxide of an element other than Sn.

主权项

1. A conductor for a flexible substrate, used for a flexible flat cable or disposed inside a flexible printed-circuit board, comprising:
a base conductor made of Cu or Cu-alloy; a plated metal film made of Sn or Sn-alloy formed on a surface of the base conductor; and a surface oxide film formed directly on a surface of the plated metal film, wherein: the surface oxide film is made of an oxide comprising a mixture of Sn oxide and an oxide of an element other than Sn; and a thickness of the surface oxide film is equal to or less than 5 nm.