Be careful with your 3 oz internals. Unless the build-up is carefully
controlled, with adequate quantities of resin (better still, buttercoat
the internals with resin before laying up), you are going to get voids
or, at least, electrical weakness in areas where there are conductor
spacings from more than 1 internal superimposed. Been there, seen it,
boom!

Brian

"S. Miller" wrote:
>
> To All,
>
> My company has been asked to tender a bid for an assembly that
> includes a 8 LYR PCB with 3 oz Cu (internal) and 4 oz (external)
> plating.
>
> I am desperately trying to find a supplier that can provide the same
> and any recommendations would be truly appreciated.

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