He must have one of them thee-raur-a-sus's. They don't let us have them in
the south
Bob
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Friday, October 11, 2002 8:25 AM
To: [log in to unmask]
Subject: Re: [TN] no clean flux as a board cleaner?
I just love reading Brian's comments. Where else are you going to find
someone use the word "horripilated"?
Doug
Brian Ellis <[log in to unmask]>@ipc.org> on 10/11/2002 03:16:26 AM
Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond
to Brian Ellis <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
To: [log in to unmask]
cc:
Subject: Re: [TN] no clean flux as a board cleaner?
Genny
It's a long time since I heard such a suggestion :-( This is murder to
any reliability. Horrendous, horrent, horrible, horrid, horrific,
horrified, horripilated, horror-struck hardly describes it. NO WAY!
Brian
Genny Gibbard wrote:
> Consider a hand rework situation.
> We had a revelation from our production floor that occasionally a
> certain product is cleaned using a no-clean flux pen. We have a product
> that the customer is very stringent that if we use no-clean solder on
> their product, we must not clean any residue off the board with our
> standard board wash.
> However, if a component is removed and replaced during a rework
> situation, often there is a lot of excess flux residue left on the
> board. It came to light that in order to make this look better, they
> were applying a small amount of no-clean flux to the area with a flux
> pen, and then scrubbing the area with a brush.
>
> There were several horrified expressions around the table when this came
> to light.
>
> What would be the dangers of doing this? The board is not heated like a
> reflow situation, or anything like that, after the 'cleaning' operation,
> so does this mean the flux may not be 'inert'? I thought that it is
> no-clean flux used in the rework in the first place - why do they need
> to clean it off? They said that it looked awful, and the inspectors
> wouldn't let the product thru if it wasn't cleaned up.
>
> Thoughts, suggestions? Should we be horrified, or just let them
continue?
>
> Genny Gibbard (mailto:[log in to unmask])
>
>
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