Hi Carl,

As XRF analyzes relatively deep layers, one can not tell where As could be coming from. You'd have to do proper analysis to establish the root cause for the problem.


Vladimir

SENTEC Testing Laboratory Inc.
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (416) 899-1882
Fax: (905) 882-8812
www.sentec.ca

-----Original Message-----
From: Carl Ray <[log in to unmask]>
Date:         Tue, 8 Jun 2010 11:44:21 
To: <[log in to unmask]>
Subject: [TN] Arsenic from XRF Testing

All,
 I have a question. We were seeing some solderability issues with some components that were provided by our customer. These devices were Sn-Pb over Cu plating per the data sheet. We tested 3 samples and noticed where all three samples have very high concentration of Arsenic. Some as much  4-5%. What could possibly be the cause for this? I understand Arsenic is used during plating process but I did not think it was as significant as 4-5%.


Carl Ray

Staff Engineer
Teledyne Electronic Manufacturing Services
1425 Higgs Rd.
Lewisburg, TN 37091
Direct: 931-270-2724
Cell: 931-637-5958
Email: [log in to unmask]<mailto:[log in to unmask]>


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