Interesting. 
I tore apart a certain smart phone a few years back and saw that they attach heat shields/heat spreaders to the PCB edge with Sn-Bi.   The PCBA was amazing but I thought the Sn-Bi solder joints had wetting issues and many of the solder joints were cracked.  Sn-Bi seems to be rather brittle.  It would be interesting to see how this particular alloy performs. 



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Buetow
Sent: Tuesday, February 14, 2017 11:38 AM
To: [log in to unmask]
Subject: Re: [TN] New Solder Alloy

I have been in touch with Lenovo about the alloy, which is a tin-bismuth alloy developed in concert with Alpha and Senju. There's some info in the link below based on what I've learned.
http://circuitsassembly.com/ca/editorial/menu-news/27004-new-lenovo-lts-lowers-melting-temp-cuts-co2-emissions.html
Best,
Mike
-------- Original message --------From: "Vargas, Stephen M" <[log in to unmask]> Date: 2/14/17  9:19 AM  (GMT-08:00) To: [log in to unmask] Subject: [TN] New Solder Alloy Got news of this from a colleague. Interesting... would love to hear comments from the TechNet group.

http://news.lenovo.com/news-releases/lenovo-announces-breakthrough-innovative-pc-manufacturing-process.htm

Regards,
Steve Vargas