A method for on-demand power management monitors a processing demand in a processing system operating at a first set of voltages and frequencies and generates a second set of voltages and frequencies in response to the processing demand. Integrated circuits are fabricated on a substrate with layers of predetermined weak and strong bond regions where deconstructed layers of integrated circuits are fabricated at or on the weak bond regions. The first and second cables each include an electrical power conductor and a plurality of first optical fibers.