And thank you all, what a wonderful resource. 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ed Hare
Sent: Thursday, March 27, 2014 2:27 PM
To: [log in to unmask]
Subject: Re: [TN] Calculate percent gold, by weight or volume?

Thanks Dave!  I'm glad that paper is of some use to you.


On Thu, Mar 27, 2014 at 11:10 AM, <[log in to unmask]> wrote:

> Hi Ed - you also should have listed the link to the paper you wrote up 
> which is an excellent read and includes the embrittlement calculation 
> equations. I have my co-ops read the paper as an introduction to the
topic.
>
> http://www.semlab.com/goldembrittlementofsolderjoints.pdf
>
> Dave Hillman
> Rockwell Collins
> [log in to unmask]
>
>
>
> From:        Ed Hare <[log in to unmask]>
> To:        <[log in to unmask]>
> Date:        03/27/2014 10:22 AM
> Subject:        Re: [TN] Calculate percent gold, by weight or volume?
> Sent by:        TechNet <[log in to unmask]>
> ------------------------------
>
>
>
> Guy,
>
> The accepted limits range from 3 - 5 wt% gold in the solder, so one 
> must calculate by weight, not volume.
>
> Ed Hare
> VP SEM Lab, Inc.
> www.semlab.com
>
>
> On Thu, Mar 27, 2014 at 8:06 AM, Guy Ramsey <[log in to unmask]> wrote:
>
> > When determining the percent gold in a solder connection, should one 
> > calculate using volume or weight?
> >
> > I always did this by calculating the volume of the solder and the 
> > volume
> of
> > the gold by thickness. Thinking that solder and gold were similar in 
> > density. eeaAhh, yeah, NO.  11 oz/cuin. Versus 5 oz.
> >
> > So, there is a big difference between calculating by weight and
> calculating
> > by volume. Which way is right?
> >
> > Guy
> >
> >
> > ____________________________________________________________________
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>
> --
> Ed Hare
> gmail - [log in to unmask]
> gvoice - 360-453-7550
>
>
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--
Ed Hare
gmail - [log in to unmask]
gvoice - 360-453-7550


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