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Date: | Thu, 27 Mar 2014 13:10:01 -0500 |
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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
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