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Subject:	Re: Orange Peel Termination Finish
From:	Richard Kraszewski <[log in to unmask]>
Reply To:	TechNet E-Mail Forum <[log in to unmask]>, Richard Kraszewski <[log in to unmask]>
Date:	Thu, 25 Mar 2010 17:07:14 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (293 lines)
If it's a real bad case of co deposition you can tell with a microscope
and solder iron. 

Just touch the tip with a solder iron and watch the melt front as it
progress up the lead. In some instances I have see little volcanoes of
dark material ~exploding to the surface. 

Rich Kraszewski
(920)969-6075

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman
Sent: Thursday, March 25, 2010 1:10 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]>


To
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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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