plating, anodizing, & finishing Q&As since 1989
Tin-silver electroplating for leadframe and other applications
RFQ: Dear ladies and gentlemen,
I am looking for tin-silver electroplating solutions for leadframe applications. Is there someone who knows who produces it? If you give me your advice, it would be highly appreciated.
Thank youChi-Ho Yoon
Sorry, this RFQ is outdated, but technical replies are welcome. No public brand/source suggestions please ( huh? why?)
A. Chi-Ho, I am sure you mean tin/silver, it may not exist. You are certain an alloy of tin/lead or pure silver will not meet your specification?Bill Hemp
tech svc. w/ chemical supplier - Grand Rapids, Michigan
A. A recent publication here in the U.S. indicates that a patent application was made for this kind of bath by Dipsol Chemicals Co., Ltd. of Tokyo Japan. The solution is a near neutral pH bath that operates slightly on the acid side.
Hope this is helpful.
Ed Budman [dec]
With deep sadness we advise that our friend Ed passed away Nov. 24, 2018
A. Dear mr. yoon,
Are you looking for Sn/Ag alloy plating solution for PPF (Pre-Plated Frame) application or Pb-free application in semiconductor packaging industry ?
Now, in case of Pb-free application, you can put your hands on Sn/Bi, Sn and Sn/Cu alloy solutions in Korea.
Sn/Zn is also available for your research purposes.
Sn/Ag solution can be made but the market volume presently does not permit developing and making it.
What is your target alloy composition of Sn/Ag?Nelson NK Key
A. My company offers a tin silver coated product. It is done utilizing the HOT-DIP TINNING process. 2 coating alloys 90%Sn-10%Ag and 95%Sn-5% AgRichard Strobel
- Waterbury, Connecticut
Hi Richard. cousin Chi-Ho has requested electroplating solutions rather than hot-dipping solutions. I don't know whether his particular application demands electroplating for any reason, but even if so, other readers may be interested to know that hot-dipping is an alternative. Thanks for introducing the idea.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
August 25, 2009
Technic has just introduced a high speed tin/silver plating process for your application. The alloy (90 to 98% tin, balance silver, depending on application) is extremely uniform over a wide variety of plating parameters (current density, temperature, etc.), and the deposit finish is semi bright. Please contact me and I will get you in touch with our Korean division.
Plainview, New York