Sounds like the customer could also use the ol' reliable pencil eraser to fix
his fid. problems.

Jason Gregory
Production Supervisor
LaBarge Inc.
(918)459-2367
[log in to unmask]






JaMi Smith <[log in to unmask]> on 11/14/2002 04:48:57 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
      JaMi Smith <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: Jason Gregory/LABARGE)

Subject:  Re: [TN] gold solderaility



Russell,

It sounds like there may be some "gold embrittlement" taking place in the
soldering process with the newer boards, among other things, and while there
may be some problems on your end, such a little more gold on your newer
boards, I think that before accepting all of the blame, you need to point
the finger back at the customer and ask him whether or not he has changed
his solder, or soldering processes, or anything else in his own processing.

You need more information from your customer in order to solve the whole
problem.

Regarding the issue of the "shiney" gold fiducials showing up as "black" due
to the reflections, the "average" customer "should" be able to adjust the
location and intensity of his light source to compensate for the
differences.

JaMi Smith

* * * * * * * * * * * *

----- Original Message -----
From: "Russell Burdick" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, November 14, 2002 2:04 PM
Subject: [TN] gold solderaility


> Hello everyone!
>
> I could use some help concerning soldering to gold.
>
> Problem:
> A customer of ours has given feedback to our salespeople that hard gold
> boards we made in May 2002 were much better to solder to than what we sent
> in October 2002. Biggest difference was stated as the newest boards have
> fiducials that auto pick and place equipment can't read because under the
> lights they look "black". Under normal shop lights both boards look bright
> and shiney(sp?).
>
> Also, the customer commented that on the boards with "black" unreadable
> fiducials had solderjoints that looked very dull.
>
> Known manufacturing/processing differences between months of May and
October
> (aka, confessions of a process engineer):
> Prior to August 2002, dull plated gold boards were scrubbed to improve
> appearances. After August 2002 no scrubbing needed when a carbon treat and
> proper wetters were performed/maintained in nickel and gold baths.
>
>
> Any and all comments are greatly appreciated.
>
>
>
>
>
> _________________________________________________________________
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