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The thermal treatment process is essential throughout a wide range of realms, from the semiconductor wafer annealing process to the joint injuries heat therapy. The conventional devices for thermal processes are mostly consistent with rigid bodies and are thoroughly heavyweight, which causes difficulties in taking sufficient conformity with the object. Moreover, yet the development of soft heaters, it is challenging to partially vary the amount of heat from heating spaces. In this study, we developed strain insensitive, partially varying soft heater by laser-induced photothermal entanglement between particulate Eutectic gallium-indium (EGaIn) and silver nanowire (AgNW) managing the reaction followed by laser intensity. The photothermal reaction modifies the structure of the EGaIn and AgNW compound, a biphasic metallic composite (BMC), promoting the adhesion between the BMC layer and the substrate. The initial conductivity and local gauge factor are influenced by the degree of entanglement which is monitored by laser intensity among the BMC and the resultant becomes effectively insensitive to the applied strain. Thus, altering the laser conditions fabricate a monolithically programmable electrical heater, reducing the power supply unit, controller, and the number of wires and connecting parts, which easily creates problems in industrial devices. This work is expected to open a new route toward the rapid creation of a complex stretchable circuitry through a single process based on EGaIn, as substantiated by the demonstration of a laser-induced BMC stretchable heater that successfully achieves spatially selective heating at distinct maximum temperatures.
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