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April 2008

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Subject:
From:
"Igoshev, Vladimir" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Igoshev, Vladimir
Date:
Mon, 14 Apr 2008 22:04:19 -0400
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Hi Gilbert,



Is ot possible to get the actual spectra and the conditions they were collected at?



Regards,



Vladimir



----- Original Message -----

From: TechNet <[log in to unmask]>

To: [log in to unmask] <[log in to unmask]>

Sent: Mon Apr 14 21:47:34 2008

Subject: [TN] Non wetting problem



Dear All.



Hope you had a nice weekend. 



I got a call from my customer that my PCB has non wetting problem, and  I

received 2 defect samples 



I saw the contaminated gold plated surface @ 1st sample, no abnormal surface

and defects were found @ other sample.



I understand the contaminated gold surface was able to make non wetting

problem, but Another sample, I couldn't find anything on surface. 



We did FE-SEM / EDX analysis. 



Results: 1st sample: Br, Au, C, O, Au



2nd sample C, O, Au Ion were detected 



. 



I wonder why Br was detected?, do you have any idea for defection of Br on

Gold plated surface?.



For 2nd sample, I have no idea, I could not understand the mechanism for non

wetting problem without any abnormal gold plated surface.



If have idea & possible, would you share your great wisdom to me?



 



Best Regards / Gilbert Min



 



Tel.: 82- (0) 11-9242-5340



 





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