Perish the thought... but could this be a re-tin job to make leaded part
look like a lead free part? That would be sort of "counterfeit"
Regards
Mike
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman
Sent: Thursday, March 25, 2010 6:10 PM
To: [log in to unmask]
Subject: Re: [TN] Orange Peel Termination Finish
Hi Joe - is the surface finish bright acid tin? Sometimes the organic
brighteners in some tin formulations, especially bright acid tin, are
codeposited and result in weird topography and/or solderability issues
during solder processing. The "bumpy" connector picture Steve posted
looked like an example of a codeposited brightener problem.
Dave
"Kane, Joseph E (US SSA)" <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
03/25/2010 10:56 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
"Kane, Joseph E (US SSA)" <[log in to unmask]>
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Subject
Re: [TN] Orange Peel Termination Finish
Here's a pretty good scan:
http://ipc-technet.groupsite.com/galleries/photo/117591
-Joe
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kane, Joseph E (US
SSA)
Sent: Thursday, March 25, 2010 11:34 AM
To: [log in to unmask]
Subject: Re: [TN] Orange Peel Termination Finish
Not blumpy exactly. I don't have a soft copy of this document, so I'm
trying to get a good scan.
-Joe
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Thursday, March 25, 2010 11:14 AM
To: [log in to unmask]
Subject: Re: [TN] Orange Peel Termination Finish
Eeeeewwwww... That is ugly!
Phil
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Thursday, March 25, 2010 10:43 AM
To: [log in to unmask]
Subject: Re: [TN] Orange Peel Termination Finish
Does it look something like this?
http://stevezeva.homestead.com/files/Connector_Blumpies.jpg
Steve
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kane, Joseph E (US
SSA)
Sent: Thursday, March 25, 2010 9:38 AM
To: [log in to unmask]
Subject: [TN] Orange Peel Termination Finish
One of our guys brought over a counterfeit parts manual with a picture of
some component leads exhibiting a rough orange-peel texture. The picture
was presented as evidence of re-tinning, which could indicate a
counterfeit part.
The question is what could cause orange peel finish after hot solder dip?
We perform a lot of hot solder dip, both in-house and outside, and neither
of us could remember the last time we saw anything like this, though it
does look kind of familiar.
In the picture, we could see no obvious patches of de-wetting or
non-wetting, just a uniform pebbly surface. I don't think this would be
caused by a solderability problem, or rapid cooling, could it be too
little immersion time in the hot solder? Could the solder in the pot be
contaminated with something like copper, gold, or iron?
-Joe
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