I'm designing a 4-layer board using PADS PCB. Both inner layers are solid ground planes. PADS wants me to select "CAM plane" as the inner layer type and the gerbers are negatives. Is that customary?
The PCB fab wants "right reading when printed" text on every layer. What does this mean?
I think it probably means:
Top Copper = Normal Inner Layer 1 = Mirrored Inner Layer 2 = Normal Bottom Copper = Mirrored
When viewed from above looking down and through the stack.
TIA