ニッケルめっきのはんだ付け性におよぼす酸化皮膜の影響
1994 年 45 巻 11 号 p. 1121-1125
詳細
1994 年 45 巻 11 号 p. 1121-1125
It was experimentally shown that when nickel oxide films were formed on nickel films electrodeposited by controlled potential technique, solderability declined with increasing quantity of electricity in anodic oxidation. Nickel films 1∼7μm in thickness were electrodeposited from a Watts bath. The real thickness of nickel oxide films was represented by the quantity of electricity in anodic oxidation because measurement by ellipsometry had a large error. Soldering to electrodeposited nickel films was virtually impossible in anodic oxidation at quantities over 15.5×10-3C cm-2. Solderability was not affected at quantities below 3.0×10-3C cm-2. After nickel electrodeposition, the nickel oxide films were dissolved by hydrogen forming by cathodic reduction at -1.40V vs. Ag/AgCl and solderability was raised.
