Electrolytic tin alloy plating solution

Abstract

An electrolytic tin alloy plating solution contains a compound serving as a source of supply of tin ions, a compound serving as a source of supply of silver ions, an oxide of a nitrogen-containing heterocyclic compound, and a flavonoid compound.

What is claimed is: 
     
         1 . An electrolytic tin alloy plating solution, comprising:
 a compound serving as a source of supply of tin ions;   a compound serving as a source of supply of silver ions;   an oxide of a nitrogen-containing heterocyclic compound; and   a flavonoid compound.   
     
     
         2 . The electrolytic tin alloy plating solution according to  claim 1 , wherein
 the flavonoid compound is a flavonoid glycoside.   
     
     
         3 . The electrolytic tin alloy plating solution according to  claim 1 , wherein
 a concentration of the oxide of the nitrogen-containing heterocyclic compound falls within a range from 0.1 g/L to 10 g/L, and   a concentration of the flavonoid compound falls within a range from 0.001 g/L to 20 g/L.   
     
     
         4 . The electrolytic tin alloy plating solution according to  claim 1 , further comprising
 a compound serving as a source of supply of copper ions.   
     
     
         5 . The electrolytic tin alloy plating solution according to  claim 1 , wherein
 the oxide of the nitrogen-containing heterocyclic compound is one or more selected from 2-methylpyridine N-oxide, nicotinic acid N-oxide, pyridine N-oxide, 4-methylmorpholine N-oxide, 3-acetylpyridine N-oxide, 2-aminopyridine N-oxide, 8-aminoquinoline N-oxide, 2,2′-bipyridyl 1,1′-dioxide, 4-(dimethylamino)pyridine N-oxide hydrate, 4,4′-dimethyl-2,2′-bipyridyl 1-oxide, 3,5-dimethylpyridine N-oxide, 4-(hydroxyamino)quinoline N-oxide, isonicotinic acid N-oxide, 2-hydroxypyridine N-oxide, 3-hydroxypyridine N-oxide, 8-hydroxyquinoline N-oxide, isoquinoline N-oxide, 2,6-lutidine N-oxide, 4-methoxypyridine N-oxide, 3-methylpyridine N-oxide, 4-methylpyridine N-oxide, quinoline N-oxide hydrate, 5,5-dimethyl-1-pyrroline N-oxide, minoxidil, 5-methylpyrazine-2-carboxylic acid 4-oxide, and 3,3,5,5-tetramethyl-1-pyrroline N-oxide.   
     
     
         6 . The electrolytic tin alloy plating solution according to  claim 1 , wherein
 the flavonoid compound is one or more selected from flavone, 3-hydroxyflavone, 5-hydroxyflavone, 7-hydroxyflavone, chrysin, morin, quercetin, baicalein, Amlexanox, khellin, 6-hydroxyflavone, 7,8-dihydroxyflavone hydrate, 3,4′-dihydroxyflavone, apigenin, 3′,4′-dihydroxyflavone, scutellarein, acacetin, kaempferol hydrate, kaempferide, isorhamnetin, nobiletin, flavanone, 4′-hydroxyflavanone, 3′-hydroxyflavanone, naringenin, hesperetin, dihydromyricetin, (+)-catechin hydrate, (−)-epigallocatechin, α-naphthoflavone, β-naphthoflavone, sodium flavonol-2′-sulfonate hydrate, ipriflavone, pentahydroxyflavone, fisetin, and myricetin.   
     
     
         7 . The electrolytic tin alloy plating solution according to  claim 2 , wherein
 the flavonoid compound is one or more selected from rutin hydrate, naringin, methyl hesperidin, baicalin, myricitrin, diosmin, Epmedin C, hesperidin, icariin, neohesperidin, wogonoside, and quercitrin.