Geometry Types

InterFET offers over 14 different standard geometry design types and multiple starting EPI configurations.
If you are starting a new design, start with the geometry. The geometry type dictates the electrical parameters required for an application. Lower numbered geometries like the N0001 series have lower gate leakage (Igss) and lower input capacitance (Ciss). Higher numbered geometries like the N3600 will have higher gains (Gm) and higher saturation current (Igss). The higher numbered geometries also have the lowest noise (En). If a compromise of parameters are needed, start with a geometry type in the middle.
We offer specialized geometries. The N0042 is optimized or high breakdown applications in the 300V to 400V ranges. The N0014 is optimized for very low noise but has a moderate input capacitance. The N3600 geometry is the lowest noise JFET in the industry.
Once you find a geometry solution, look for a standard part in the geometry. Start with parts that are close to the application and have InterFET customize it if you require optimized performance. Learn more about custom parts.
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