1. A semiconductor device, comprising: a first layer including a circuit; a second layer including a plurality of circuits in a first plurality of locations; and a third layer including a plurality of pads in a second plurality of locations, wherein the circuit is configured to depend on at least one of the second layer or the third layer to operate, wherein the first plurality of locations and the second plurality of locations are configured to be independent of the first layer, and wherein the first layer, the second layer, and the third layer form a stack.