Info you got is true.  Also, the solder mask may be a darker color.
Normally there is no
effect on the board function/reliability

Randy Bock Sr.
Quality Manager
Bryce Office Systems LLC
email [log in to unmask]


----- Original Message -----
From: Houston, Terri <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, April 11, 2002 8:54 AM
Subject: [TN] Coloration differences between batches of flex circuits


> Hi folks,
>
> We recently received a batch of 3-layer flex circuits, which were much
> darker in color from the previous batch received (think copper colored vs.
> chocolate colored).
>
> I was told that the darker batch received a longer bake and that the
> coloration difference was cosmetic.
>
> Since I don't have a lot of experience with flex, I'm looking for input
from
> flex manufacturers/users on whether color differences between batches are
> common and acceptable.
>
> Thanks in advance,
>
> Terri
>
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