"Maybe we should have more community "case studies", I find the group
feedback to be very educational, especially when the descriptions in
IPC-A-600 are vague"
http://defectsdatabase.npl.co.uk/
Rex Waygood
Technical Manager
PartnerTech Poole Ltd
Benson Road
Poole
Dorset BH17 0RY
United Kingdom
Tel: +44 (0)1202 674333
Fax: +44 (0)1202 678028
DDI: +44 (0)1202 338222
Mob: +44 (0)7887 997403
[log in to unmask]
www.PartnerTech.co.uk
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
Sent: 20 May 2008 15:36
To: [log in to unmask]
Subject: Re: [TN] Blue Voids
Well, since our supplier hadn't seen this condition in their
microsections, and the independent lab used different equipment
(Scanning Electron Microscope and Differential Interference Contrast
photography), the question became whether the supplier's lab could even
see the condition if it was present.
The independent lab still has the sample panel with the known condition,
and they agreed to send back half of the panel so the supplier can
experiment with it.
In the meantime, our company issued a corrective action request so we
get some kind of follow-up on the results.
Thanks to everyone who looked at the evidence and sent their opinion.
http://frontdoor.biz/PCBportal/bluevoid.jpg
p.s. I think its kind of fun to do this (especially when it is not MY
company's sample) .
Thanks again.
onward thru the fog,
Jack
-----Original Message-----
What became of this issue? I have not seen any more threads of e-mail.
Victor,
From: TechNet [mailto:[log in to unmask]] On Behalf Of [log in to unmask]
Sent: Tuesday, April 29, 2008 9:59 PM
To: [log in to unmask]
Subject: Re: [TN] Blue Voids
Are the voids in the glass bundle or between the glass bundle and the
resin?
If the former, you have a glass supplier problem (not all the weaving
assistant burned off?)-- if the latter, then I would suspect incorrect
pH in the adhesion promoter application bath.
Bill Kenyon
Global Centre Consulting
3336 Birmingham Drive
Fort Collins, CO 80526
Tel: 970.207.9586 Cell: 970.980.6373
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