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November 2001

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Subject:
From:
"Atkinson, Neil" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 22 Nov 2001 07:54:31 -0000
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I think this one depends on which side of the fence you are on.

I personally would prefer not to have any track repairs.  If you do decide
to allow repairs then I would get a copy of IPC7721 and decide which of the
many methods in the standard you want your supplier to use.  I would also
insist that any repaired boards are segregated from normal production with a
list of the locations of the repairs.

If you make the procedure complex enough your supplier may just decide it's
not worth the bother and scrap them / improve his yield!!

Neil

 -----Original Message-----
From:   Kathy Bergman [mailto:[log in to unmask]]
Sent:   21 November 2001 17:41
Subject:        Re: Raw Card Track Repairs

IPC-6012A describes the characteristic "circuit repairs" as being acceptable
in Class 1, 2,
and 3 only "As agreed by user and supplier." Generally these repairs, if
done properly, are
reliable. See IPC 7721 for methods. It is your call, basically.

K. Bergman

Stephen Brown wrote:

> People.
>
> We get our PCB's assembled to IPC-610 class 2. We have recently been
> approached by our vendor regarding track repairs on our raw cards. Now I
> personally am not keen on allowing this, but is there a standard for raw
> cards similar to 610 which states an allowable quantity of track
> repairs, if any?
>
> Regards.
>
> Steve Brown.
> Commodity Specialist
> Xyratex.
>
>
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