Towards A Computer-Aided Design Tool Dedicated to Foundry Open Gate Junction Field-Effect Transistor Sensor’s Process

This paper underscores the necessity of creating a user-friendly computer-aided design interface application tailored for the design and simulation of a standard foundry silicon-based transistor called the open-gate junction field-effect transistor (OG-JFET). Leveraging fabricated chip and characterization results, the simulation application is developed using the COMSOL Application Builder. This significantly streamlines the simulation and analysis process, particularly for individuals with limited expertise in electrical engineering and semiconductor devices. Constructing the application within COMSOL Multiphysics offers enhanced adaptability in comprehending and crafting biosensors for prospective users of this technology. This proves vital given the multifaceted demands of biosensor design, which encompass various physics domains such as solution properties, electrical fields, magnetic fields, and charge interactions—all facilitated by the multiphysics nature of COMSOL. These aspects are not readily accessible through other semiconductor simulation software platforms like TCAD. The results of a single channel OG-JFET with a channel length of 5 µm with p-type thickness of 1.6 µm is compared to the experiment showing perfect agreement in the 0.5 < Vgs < 0.8 range and Vds = 1 and 2 with minimum mismatch.