Or you can post a picture and we can tell you what it "probably" is.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev
Sent: Saturday, March 02, 2013 8:07 PM
To: [log in to unmask]
Subject: Re: [TN] corrosion under Solder Mask

Hi Ramakrishman,

In general, there is a number of various tests to figure out what could have caused the problem. Some of them are X-sectionning, SEM/EDS, FTIR.

It's difficult, though to say which ones should be used in your specific case without seeing the actual sample.
------Original Message------
From: Ramakrishnan Saravanan
Sender: TechNet
To: [log in to unmask]
ReplyTo: TechNet E-Mail Forum
ReplyTo: Ramakrishnan Saravanan
Subject: Re: [TN] corrosion under Solder Mask
Sent: Mar 2, 2013 20:15

Dear Mr Vladimir.i Goshev, 

Thank you for the reply. Sorry being ignoramus , what are the possible FA actions to be carried out to fins the root cause of the problem. regards,

R.Saravanan  


Regards,

Vladimir

SENTEC Testing Laboratory Inc.
11 Canadian Road, Unit 7.
Scarborough, ON M1R 5G1
Tel: (647) 495-8727
Cell: (416) 899-1882
www.sentec.ca

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