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September 2007

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Subject:
From:
Roland Jaquet <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Roland Jaquet <[log in to unmask]>
Date:
Fri, 28 Sep 2007 15:56:03 +0200
Content-Type:
text/plain
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text/plain (68 lines)
Hi Kevin,

Looks like an innerlayer is not fully etched.. 

In any event, it does not look good and I would not use the PCBs

Meilleures Salutations
Very Best Regards
Roland
 
www.PCBspecialist.com 
Roland Jaquet
14 Champ Budin
1258 Perly, GENEVA
SWTZERLAND
TEL+41-22-880-0405 GSM+41-79-203-3723 FAX +41-22-880-0409
"Quality is best measured not by the return of the products but by the
return of the customers"

-----Message d'origine-----
De : TechNet [mailto:[log in to unmask]] De la part de Kevin Glidden
Envoyé : vendredi, 28. septembre 2007 15:06
À : [log in to unmask]
Objet : [TN] Copper Staining in PCB laminate

We recently received a shipment of PCBs where the exposed outer layer
laminate has staining that looks like copper. I have a photo -
<http://tinyurl.com/yp9za2> http://tinyurl.com/yp9za2
My question is what would cause this?  I've never seen it before, but I am
thinking something in the Copper plating process.  The vendor is telling us
it is staining but it is an asthetic issue only. What would cause it?  Is it
an asthetic issue only?  It seems to me if the staining was caused by some
plating chemistry, then it would effect the laminate properties,
particularly the insulation resistance.
 
Thanks!
 
Kevin Glidden
Manufacturing Engineer
Luminescent Systems Inc.
 
 
 

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