it with tin whisker inhibitor and anti- tin whiskers taker 's method

摘要

The present invention is sufficient to smooth the surface of the material also be tin-plated with some etching amount of tin whiskers is of about the effective agent to be in tin whisker and whisker resistance tin plating method using the same water prevented. ; and tin whiskers agent of the present invention the pH is below 5, the iron-based oxidant compound preferably ferric chloride, ferric sulfate and / or ferric nitrate, preferably a nonionic surfactant represented by the following general formula (1) and / or the compound represented by the general formula (2) as, and copper containing ion :;A[(C₃H₆O)_n(C₂H₄O)_mH]_k (1);A[(C₂H₄O)_m(C₃H₆O)_nH]_k (2) in ; (the formula (1) and (2), wherein A is a k-valent active hydrogen-containing compound residue, wherein k is a number of 1 to 4, wherein n is from 3 to The number of 35, and the m is the number of 1 to 70).