Hi Louis,
Regardless of the specific surface finish, you'd want to use SEM/EDS in order to see what is present on the surface.
If you need help, please let me know, as we do that type of analysis on a regular base.
To make things more interesting, sometime so called "solderability issues" have nothing to do with actual ability of a given surface to be soldered. I had one of those cases published a year ago in the SMTA magazine.
Regards,
Regards,
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: Louis Hart <[log in to unmask]>
Sender: TechNet <[log in to unmask]>
Date: Fri, 1 Jun 2012 19:09:50
To: <[log in to unmask]>
Reply-To: TechNet E-Mail Forum <[log in to unmask]>,
Louis Hart
<[log in to unmask]>
Subject: [TN] pad surface analysis
TechNetters, surface solderability of a batch of boards has been questioned by a customer. J-STD-003 solderability testing before the boards were shipped, and again, on spare coupons, after receipt by the customer was unremarkable, i.e., everything passed.
In that context, I am wondering what analytical tools are suitable for analyzing a surface for possible contaminants or residue, in particular those which might inhibit soldering. Some searches of the archives since 28 Feb 2012 turned up no postings relating solderability and surface analysis.
Thanks for any information or comments.
Louis Hart
Compunetics
Monroeville, PA
USA
[log in to unmask]<mailto:[log in to unmask]>
412-858-1232
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