The present invention utilizes solid-state components' / devices' electrically-conductive elements as means for transport of thermal-energy via the application of the Thomson Effect through affecting a change in temperature, such as in the electrical power supply leads. Application may be at electrical current characteristics below that required to energize said solid-state components / devices to achieve intended solid-state utility output. The present invention applies Tesla's phase-change conductive / non-conductive, both of an electrical and / or thermal nature, to the present art of solid-state electronics' individual integrated circuit elements, printed wiring boards, insulating layer(s), and pillars for the optimizing of the thermal-energy-management of such. The present invention analyzes three-dimensional thermal volumes of solid-state items and effecting change of temperature via said items' electrical pathway(s) and / or by effecting said pathways by altering the matter-phase of such pathways resulting in change in conductivity / non-conductivity, both of an electrical and / or thermal nature, of said pathways.