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July 2012

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Subject:
AW: [TN] Copper Dendrites
From:
"Grossmann, Guenter" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Grossmann, Guenter
Date:
Fri, 6 Jul 2012 15:07:00 +0200
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Graham

I agree. I even would say that conformal coating might well promote the growth of dendrites if the PCBs are not cleaned well ahead of the coating.

Günter Grossmann



>-----Ursprüngliche Nachricht-----
>Von: TechNet [mailto:[log in to unmask]] Im Auftrag von Graham Naisbitt
>Gesendet: Freitag, 6. Juli 2012 14:23
>An: [log in to unmask]
>Betreff: Re: [TN] Copper Dendrites
>
>Hi Neil
>
>I stand by my earlier posting on this. Neither a solder resist nor a
>conformal coating will PREVENT dendrites, they might delay it for a
>while, but then what is lurking and festering underneath..just when you
>thought it was safe to go back in the water!?
>
>Graham Naisbitt
>
>
>On 5 Jul 2012, at 19:50, Neil Atkinson wrote:
>
>> Thanks everyone for comments so far - haven't been on Technet for a
>while so it was good to get such good responses.
>>
>> Really miss Werner for questions like this...
>>
>> Actually we have never seen a failure for dendrites; however, we have
>a customer who has a past problem with another supplier due to dendrites
>on PCBs and as a result wants us to cover vias with solder resist or
>conformal coating.
>>
>> Tha,
>>
>> Neil
>>
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