Careful now; a single successful test tells you it MAY work, a failing test
teaches you a lot: it does not work.

Having fun,
Ahne.

PS:
FR406 1080
Glass style 1080: thickness 1.9-2.3 mil (is that the range of the glass
fibers? If not, what is?)
Customer demand dielectric thickness: min dielectric thickness of 1.181 mil
(30um).
Puzzling.



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dwight Mattix
Sent: Tuesday, June 01, 2010 09:52
To: [log in to unmask]
Subject: Re: [TN] Single-ply construction

If prepreg bonding to cores then the tooth isn't an issue.

Have they got lead time to allow for a scout lot thru 
lamination?  Maybe you can negotiate an R&D type P.O. that gets you 
paid for that test effort regardless of flow/fill/delam. Then that 
becomes a gate/decision point for both parties to decide whether or 
not to proceed beyond that with full qty.


At 09:18 AM 6/1/2010, Chuck Brummer wrote:
>Dan,
>
>Are they not concerned that the dielectric breakdown will be too low?  You
>will have the tooth of the copper touching the glass fabric on both sides.
>
>There may be cross-talk issues too?
>
>Chuck Brummer
>3M Manufacturing Engineer
>8357 Canoga Ave.
>Canoga Park, CA 91304-2605
>(818) 734-4930
>
>
>
>
>From:
>Dan Skweres <[log in to unmask]>
>To:
>[log in to unmask]
>Date:
>06/01/2010 08:19 AM
>Subject:
>[TN] Single-ply construction
>Sent by:
>TechNet <[log in to unmask]>
>
>
>
>We have a customer insisting that we use a single ply of FR406 1080
>between two copper layers each 1 oz. copper. One layer is a plane and the
>other a signal. We're quite concerned that there will be issues with fill.
>We don't recommend single-ply construction especially against two 1 oz.
>copper layers. Any thoughts, comments and/or concerns would be
>appreciated.
>Thanks!
>Dan S.
>
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