Gary, in addition to the question below on present surface finish are several more (sorry for the "it depends" answer on a Friday)

1. What spec do the final boards have to meet for your use?? Do they have to be restored to IPC Class 3, or can they be "will work in the intended application for say two years"

2. You say assemblies - is there any space between the components there now and the edge connector area.? I am driving at the ability to apply a temporary bus-bar for electroplating current so all fingers can be corrected at once (the way the fingers should have been built when the bare board was fabricated.)? The bus-bar electrically connecting all the fingers is removed late in the bard board manufacturing cycle.? 

3. If you could apply a temporary bus bar, would that current damage some sensitive devices on the board?? That is presuming that any chemical fumes could also be prevented through masking or bagging the balance of the assembly

4.? Most likely, you will now have to apply the nickel/gold finger by finger through a technique called brush plating - applying a grounding probe to each finger and then using an electrified brush (sponge?) to each finger.? That sponge contains a bit of nickel or gold plating solution liquid that adds the metal where reduction potential exists.? There are many repair services that can do this, but one finger repair is much more common than correcting all the fingers.? Also, this technique would be hard to certify to a rigid spec like Class 3.? 

Hope this helps 
Denny Fritz - MacDermid, Inc. 



-----Original Message-----
From: James Mahoney <[log in to unmask]>
To: [log in to unmask]
Sent: Fri, 3 Apr 2009 12:43 pm
Subject: Re: [TN] Edge connector repair



What's the surface finish you are dealing with? Some hard gold plating lines
could handle assembled boards depends on the board configuration. I would
think removing the current surface finish will be the biggest challenge.


Please update your contact for Jim Mahoney
[log in to unmask]
Thank you, 
Jim Mahoney 
Quick Turn Flex Circuits, LLC 
Applications Project Manager 
P# 603-821-6571 
F# 603-821-5723 
M# 603-305-6250 


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Gary Camac
Sent: Friday, April 03, 2009 12:39 PM
To: [log in to unmask]
Subject: [TN] Edge connector repair

Good morning all,

 

Here's the scenario - I have assemblies that should have Ni/Au plating
on edge connector but don't; the assemblies are built; can repairs be
made?

 

Thanks in advance, 

 

Gary Camac

Senior Manufacturing Engineer

DICKEY-john Corp.

5200 Dickey John Road

Auburn, IL 62616-0010

Telephone 217-438-2288

[log in to unmask]


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