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Subject:	Re: New Solder Alloy
From:	"Stadem, Richard D." <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Stadem, Richard D.
Date:	Wed, 15 Feb 2017 14:03:19 +0000
Content-Type:	text/plain
Parts/Attachments:	text/plain (1 lines)

That is correct. You don't get something for nothing when it comes to solder.

I wonder if Lenovo included the carbon impact for all of the hot air rework machines running 24/7?



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of David Hillman

Sent: Tuesday, February 14, 2017 6:02 PM

To: [log in to unmask]

Subject: Re: [TN] New Solder Alloy



Hi TechNet - I will echo Andy's comments, the SnBi solder alloy system may have some application in some products but a number of solder alloys in the SnBi alloy family have been extensively investigated and found to not be applicable for a large segment of high performance product types/use environments.



Dave



On Tue, Feb 14, 2017 at 2:06 PM, Giamis, Andy <[log in to unmask]>

wrote:



> 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

>

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