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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