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May 1998

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Subject:
Re: Particles in holes
From:
"<Jason M. Smith>" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 15 May 1998 06:07:47 -0400
Content-Type:
text/plain
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text/plain (67 lines) 
The question would be.....do you have any idea what the particles are?
That would be my number one step is solving the problem.  Kinda hard to fix
a problem without knowing the root cause of it.  Send a sample to a lab to
determine what it is.  Could be dross.....could be from the flux
particulates....could be from you board coating.....get my picture.

Jason Smith
Process Materials Engineer
Lexmark Electronics
(606) 232-7667





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Subject:  [TN] Particles in holes




Sorry for my earlier mail without subject
------------
Hi
We are getting particles in both component holes / via holes on and off
and in double sided / multilayer boards. This is observed after pattern
plating
We use High build copper and Pattern plating.
In some holes the particles are severe and reduce the hole size
considerably. The problem is occuring very randomly.
Has anybody got remedy for this ?
Thanks in advance for the help
Milind

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