Hi I have a design of 6 layers that I started off with and I need to modify to a 2 layer design. I am successfully able to reduce the number of electrical layers to 2 but after I do so PADs will no longer allow me to route onto the bottom layer. I can reduce the number of layers to 3 and still be able to route both top and bottom. But once I go down to 2 layers it doesn't let me create VIAs or route on the bottom layer
Does anyone know why this is and how I can fix it?
Thanks a lot in advance