Hi,
How are the boards cleaned before coating? For a test sample of boards, take a Q-tip with a solvent like Xylene and manually scrub the problem areas and then try the coating process. That way you can change the cleaning procedure if necessary for those particular boards.

Amol Kane
M.S (Industrial Eng.)
Process Engineer
Harvard Custom Manufacturing 
941 Route 38  Owego, NY 13827
Phone: (607) 687-7669 x349
[log in to unmask]

 -----Original Message-----
From:   TechNet [mailto:[log in to unmask]]  On Behalf Of Graham Naisbitt
Sent:   Thursday, June 22, 2006 7:15 AM
To:     [log in to unmask]
Subject:        Re: [TN] Conformal Coat Voids

 << File: ATT44723.txt >> Hi Kenny

Clutching at straws here - any chance you have "drilling" residues
before the via is plated?

Can it be something from the via plating operation that has changed?

Have you noticed de-wetting anywhere other than the via's?

Regards
Graham Naisbitt

[log in to unmask]

Phone: +44 (0)12 5252 1500
Mobile: +44 (0) 79 6858 2121


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