Werner

I am not sure where you are coming from. Steve referred to an immersion 
silver finish on the board. Given that we have giga millions of immersion 
silver solder joints and I have never seen or heard of a document case of 
silver embrittlement resulting from these joints. Is it your opinion that 
immersion silver can embrittle a solder joint?

Best regards

Lee


----- Original Message ----- 
From: "Werner Engelmaier" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 24, 2007 2:38 PM
Subject: Re: [TN] Silver Embrittlement?


> Hi Steve,
> You sure got your problems.
> Yes, Ag-embrittlement is similar to, but actually worse than
> Au-embrittlement, and for the same reasons. Of course, combining them is 
> giving you
> AghhhAuhhh-embrittlement [or is it Auhhh Aghhh?].
> TSOPs, unless made with a Cu-leadframe are bad news; there CTE's are c'ose 
> to
> ceramic because of the alloy-42 CTE (a magnet can tell you). ...and TSOPs 
> do
> not deserve to be called 'leaded components.'
> This compress a fractured SJ is used by a lot of people who's laptops are
> conking out because of SJ-failures.
>
> Werner
>
>
>
> **************************************
>  See what's free at http://www.aol.com.
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