Hi Blair,
Stronger solders are NOT better—they create new failure modes like pad cratering.
Werner

 


 

 

-----Original Message-----
From: Blair Hogg <[log in to unmask]>
To: [log in to unmask]
Sent: Thu, Mar 4, 2010 12:00 pm
Subject: Re: [LF] magnetic solders?


For purposes of discussion, I toss out my $0.02....

The article states that the addition of iron makes the solder stronger. Is 
stronger better? Solder needs ductility as it has to absorb the stresses from 
CTE mismatch between the PCB and components.

Heat the solder by magnetic induction, thus the remainder of the assembly is 
not subjected to heat. Bu tdoesn't there need to be heat in the component 
leads and the board lands for proper intermetallic bonds to form? Will there be 
proper wetting without heating the components / leads? Granted, some heat 
will transfer from the molten solder to the leads, similar to hand soldering, 
but 
will it be enough on a larger scale?

Blair

On Thu, 4 Mar 2010 11:23:27 -0500, Eric Bonatti 
<[log in to unmask]> wrote:

>Hello all,
>Have you folks seen this?  
>
>http://www.articleant.com/gen/13521-new-magnetic-solders-are-a-leap-
towards-green-alternatives.html
>
>
>I'm really curious to hear your thoughts on it.  
>
>Thanks,
>
>Eric Bonatti, C.I.D.+

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