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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