Newbie here,
I'd like to have a thin board (~0.6 mm) with 2 FR4 layers and gold on top. I'd like to have a large rectangular region where the only top FR4 layer is removed. In the middle of that region, I'd like a smaller rectangle that is a hole through the board. Basically, in the region with the arrow in the attached picture, I'd like the following layering (M=metal, F=FR4, space = nothing).
Top - MMMM MMMM
Mid - FFFFFF FFFFFF
Bot - FFFFFFFFFFFFF FFFFFFFFFFFFFF
How can I accomplish this? My first thought was a Cavity in the Mid layer and a board outline for the small hole. The 3D viewer doesn't look exactly like I want. What can I change?