Abstract: This topic mainly demonstrates the simulation of standard cases such as p-n junctions and metal-semiconductor contacts using Nuwa TCAD software, focusing on the material parameters, structure setup, solver settings, simulation results, and analysis of physical correctness.
Standard structures such as pn junctions, metal-semiconductor (MS) contacts, and metal-insulator-semiconductor capacitors (MIS) are the foundation of semiconductor physical devices. Ensuring the correctness of the simulation results for standard cases is the prerequisite for measuring the characteristics of all complex physical devices. Our requirements for standard case simulations include software robustness and physical correctness.
For any physical device, the necessary condition for the simulation to proceed is that each standard component can independently run correctly within the simulation. Therefore, we need to ensure that the simulation of standard cases does not encounter errors under different structures and solver settings, and that the results can be obtained within a reasonable error range and time frame.
We are highly concerned with the physical correctness of the simulation results for standard cases. By setting up models during the solving process, we can compare the physical quantities simulated under different physical scenarios with existing theoretical results. Only when the results of the standard cases match physical expectations can the simulation of complex device characteristics become possible.
So far, Nuwa TCAD software has been able to complete the simulation of basic devices such as p-n junctions (both homogeneous and heterogeneous), metal-semiconductor (MS) contacts, metal-insulator-semiconductor capacitors (MIS), bipolar junction transistors (BJT), MOSFETs, and TFTs. In the solving process, it can achieve the required convergence accuracy and speed.
The simulation results of the standard cases also meet the corresponding physical expectations. We have compared the calculation results of potential and carrier concentration in different scenarios with theoretical values, and they have been verified and passed. For different physical scenarios, Nuwa TCAD can obtain reasonable results by selecting appropriate models during solving.
We will continue to improve and optimize the simulation of standard cases by Nuwa TCAD, including both numerical solving performance and physical models.
By improving the meshes and algorithms, we aim to continuously reduce the number of meshes and the solving time required while ensuring the physical correctness of the simulation, and increase the accuracy and stability of iterations.
To simulate more complex physical scenarios, we will continuously add physical and mathematical models that can be selected during the solving process, making the results more consistent with real physical situations. In the future, we plan to add models that cover areas such as high-frequency, optoelectronics, electro-optics, quantum effects, cross-scale effects, and mixed-mode scenarios.