Patent ID: 11879182
Assignee: MITSUBISHI MATERIALS CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A tin alloy plating solution comprising:
(A) a soluble salt including at least a stannous salt;
(B) a soluble salt of a metal nobler than tin;
(C) a leveling agent consisting of an alkane sulfonic acid including 9 to 18 carbon atoms in a molecule or a salt thereof;
(D) a non-ionic surfactant including one or more phenyl groups in a molecule; and
(E) a free acid,
wherein an amount of the soluble tin salt (A) is in a range of 5 g/L or more and 200 g/L or less in terms of an amount of tin,
an amount of the soluble salt (B) of the metal nobler than tin is in a range of 0.01 g/L or more and 10 g/L or less in terms of an amount of the metal,
an amount of the leveling agent (C) consisting of the alkane sulfonic acid or the salt thereof is in a range of 0.01 g/L to 1 g/L,
an amount of the non-ionic surfactant (D) is in a range of 0.01 g/L or more and 50 g/L or less, and
an amount of the free acid (E) is in a range of 5 g/L or more and 500 g/L or less.