NDLI: Characteristics of Electroless Sn Plating Electrolyte using a Choline Chloride-Based Ionic Liquid

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Characteristics of Electroless Sn Plating Electrolyte using a Choline Chloride-Based Ionic Liquid

Content Provider	Semantic Scholar
Author	Park, Chieon Yoo, Bongyoung Lee, Joonkyun
Copyright Year	2018
Abstract	In the present study, a choline chloride(ChCl)-based ionic liquid(IL) was used as an electrolyte to confirm the characteristics of electroless tin plating. The effect of the type of additive and reducing agent, as well as the addition of complexing agent and water, on the properties of the ChCl-based IL, including the freezing point, viscosity, conductivity, open circuit potential, and plating thickness, was investigated. The results showed that the crystallization temperature was 25 oC when the ChCl-thiourea molar ratio was 1:1, and it decreased to 10 oC upon adding the additive, while the conductivity increased and viscosity decreased. Dimethylthiourea was added to promote the electroless plating reaction. Electrolytic tin plating was performed at 70 oC using ChCl -thiourea-based IL as the electrolyte. The thickness of the tin-plated layer was 1.5 μm when malonic acid and dimethylthiourea were used. The addition of a small amount of water increased the plating speed and thickness, and the maximum thickness of 2 μm for the tin-plated layer was obtained after 30 min. These characteristics demonstrate the potential applications of these environmentally friendly electrolytes for fast, thick, and dense electroless tin plating using ILs at low temperatures. (Received May 4, 2018; Accepted July 2, 2018)
Starting Page	645
Ending Page	651
Page Count	7
File Format	PDF HTM / HTML
DOI	10.3365/kjmm.2018.56.9.645
Volume Number	56
Alternate Webpage(s)	http://kjmm.org/upload/pdf/kjmm-2018-56-9-645.pdf
Alternate Webpage(s)	https://doi.org/10.3365/kjmm.2018.56.9.645
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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