William,
 
I've noted that there have been several requests on TN recently about
conformal coating.  I don't have enough experience with conformal
coating to be able to provide useful information but I am curious why
your several customers are asking for conformal coating on their PCB
assemblies.   Do you know if there requests are due to deployment of
their products in environments that don't have good air quality (i.e.,
Asia-Pacific, India, etc.)?

Regards,
George
George M. Wenger
Andrew Reliability/FMA Engineer
40 Technology Drive, Warren, NJ 07059
(908) 546-4531 [office]  (732) 309-8964 [mobil]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
Sent: Wednesday, September 13, 2006 7:28 PM
To: [log in to unmask]
Subject: Re: [TN] bareboard cleanliness related to surface finish

Hi Folks:  My company is beginning to be asked by several  customers for
conformal coating on their PCB assemblies.  We are currently  building
to
IPC-A-610 using a combination of SMT and T/H technology in a  no-clean
manufacturing
process flow.  From my old PCB days, I remember  problems with PCB
cleanliness
and conformal coating peeling off the PCB  surface.

What are folks using today for a conformal coating in a no-clean
manufacturing environment?  Do I need to worry about cleanliness at all
today?  With
RoHS and lead-free processing/PCB finishes how are surface
contamination levels
affected??

I'm just looking for some basic information to point me in the right
direction.....rather not have to re-invent the wheel.  Thought this
would  be the
perfect forum for this type of question!!!!

Thanks in advance for any help and guidance you folks may
provide!!!!!!!

Sincerely,

William E. Black
Medco
Quality Assurance Manager
Tel:   1 631 667 9699
e-mail:  [log in to unmask] (mailto:[log in to unmask])




























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