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December 2003

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Subject:
From:
Chris Robertson <[log in to unmask]>
Reply To:
Chris Robertson <[log in to unmask]>
Date:
Tue, 30 Dec 2003 08:16:53 -0600
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The first question is, does your contract for the work require Mil Spec?
If it does then it is a closed issue and you can't waiver it. (Sure you figured that that much)
I don't think you should have to waive it because of their short comings. They are trying
to cover their tail when they have a scale in their drill or image.
I try to work with the manufacturer as much as possible, but there are some things you
don't budge on. I believe this is one of them.
At least have them cross section one of the boards to verify this. (at their cost)


Chris Robertson
[log in to unmask]
  ----- Original Message -----
  From: Bruce D Stilmack
  To: [log in to unmask]
  Sent: Tuesday, December 30, 2003 8:06 AM
  Subject: [TN] Annular ring


  I have a PCB manufacturer requesting a waiver for the MIL SPEC requirement
  of a 2 mil annular ring.  Their position is that the coupons are from the
  edge of the laminate where the registration is worse.  The assumption is
  that the ring will be larger in the PCB itself.  I am leery to grant a
  waiver to allow this deviation, but would like to know how the community
  feels about this.

  Bruce Stilmack
  GDLS-TO Manufacturing Engineer
  (850) 574-4773
  [log in to unmask]

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