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May 2014

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Subject:
Re: Solder Mask over Tin Lead Plating
From:
CANTAGALLO Luigi <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, CANTAGALLO Luigi <[log in to unmask]>
Date:
Mon, 5 May 2014 07:04:20 +0200
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Hello.
You are right. 
We have tested that and have seen that the soldermask presented many cracks after reflow.

Best regards,
CANTAGALLO Luigi

[@@ OPEN @@]
-----Message d'origine-----
De : TechNet [mailto:[log in to unmask]] De la part de Ramakrishnan Saravanan
Envoyé : dimanche 4 mai 2014 10:18
À : [log in to unmask]
Objet : [TN] Solder Mask over Tin Lead Plating

Hi,

We received few PCBs from an European PCB manufacturer for Aerospace Industry. I am surprised to see Solder Mask is applied over tin lead plated tracks. My understanding is if u do reflow , the solder under the mask will melt and affect the mask. The correct method is applying Soldermask over bare copper isn't?. Kindly advise. regards,

R.Saravanan
 

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