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John,
perefecTest is a system which measuring material scaling factors.
For more information :
American Testing Corporation
18348 Redmond Way , Redmond , WA 98052
Phone: (206)882-2856
Fax (206)882-3278
I hope this will help
[log in to unmask] wrote:
> TechNet:
>
> We have been experiencing some registration problems lately, and I was
>
> wondering if anyone is aware of a software program that can help in
> determining inner-layer scaling factors.
>
> I was told that there may be such a program available. It supposedly
> takes
> into account copper weight, copper area per side, core thickness, and
> overall
> board construction to calculate scaling factors for the various core
> thicknesses within the MLB.
>
> Any input on this, including other methods of calculating scaling
> factors,
> would be appreciated.
>
> Thanks,
> John Lennox
> Process Engineer
> EMC
>
> ***
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