Sn coating material and manufacture method thereof

Sn coating material and manufacture method thereof

  • CN 106,068,337 A
  • Filed: 02/25/2015
  • Published: 11/02/2016
  • Est. Priority Date: 03/04/2014
  • Status: Active Application
First Claim
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1. Sn coating material, it is the Sn coating material after Sn plating is implemented on the surface of the base material being made up of copper or copper alloy,It is characterized in that, the surface of base material forms the basal layer being made up of at least one party in Ni and Cu-Ni, the surface shape of this basal layerBecome adjacent by being positioned at of the Cu-Sn class alloy-layer being made up of the crystal grain of substantial amounts of Cu-Sn class alloy and outmost surfaceThe outermost layer that Sn layer in the recess of the crystallization intergranular of Cu-Sn class alloy is constituted, in outmost surface, the area occupation ratio shared by Sn layer isThe maximum gauge of 20~

  • 80%, Sn layer is less than the mean diameter of the crystal grain of Cu-Sn class alloy.

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