Electrical connecting pin, especially a coil former pin, and a method for its production

摘要

The connecting pin is preferably embedded in a plastic part and is used for the solder connection of an electrical cable (line, lead). A nickel barrier layer is initially deposited onto the pin material, which consists of a copper-tin alloy, over which nickel barrier layer an outer solder layer is arranged which is used for the connection of the electrical cable and consists of a lead-tin mixture. In order to ensure solderability despite surface damage, it is proposed to electroplate a silver intermediate layer between the inner nickel barrier layer and the outer tin-solder layer and to produce a diffusion alloy with the outer tin-solder layer by tempering the pin.