Hi,
In days gone by, it was known that a 4 layer PCB with "1 ounce copper", would have 1 ounce copper on top and bottom layers....but the inner layers would be half ounce.
Just been quoting on China PCB places, and it seems possible to have 1 ounce (or even 2 ounce), on all layers, and it doesnt mean big price increase.
So has the old "less copper weight on inner layers" thing now dead?