Simulation system estimating self-heating characteristic of circuit and design method thereof

A method of designing a semiconductor circuit using a circuit simulation tool executed by an information processing device, the method comprising:

• receiving an electric netlist of the semiconductor circuit and material and geometry information of elements included in the semiconductor circuit;
• conducting a first simulation of the semiconductor circuit's operation with the electric netlist using the circuit simulation tool;
• creating a thermal netlist corresponding to a thermal circuit representation of the semiconductor circuit depending on at least one of power consumptions of the elements generated according to the first simulation, the material information, and the geometry information;
• performing a second simulation of the semiconductor circuit's operation with the thermal netlist using the circuit simulation tool to detect temperature variations of the elements;
• and
• revising the electric netlist based on the detected temperature variations to create a revised electric netlist,
• wherein the thermal circuit includes a thermal capacitance parameter for detecting the temperature variations of the elements dynamically.