MOSFET SiO₂ Oxide Thickness Calculator
Compute the equivalent SiO₂ gate oxide thickness from capacitance per unit area using εox = 3.9·ε0.
Description
Compute the equivalent SiO₂ gate oxide thickness from capacitance per unit area using εox = 3.9·ε0.
MOSFET SiO₂ Oxide Thickness Calculator is a focused tool for the following task. Compute the equivalent SiO₂ gate oxide thickness from capacitance per unit area using εox = 3.9·ε0. It reports tox from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use MOSFET SiO₂ Oxide Thickness
Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.
- Cox (fF/µm²)
- Required number in fF/µm². Gate oxide capacitance per unit area. Must be greater than 0 fF/µm².
The cited overview of MOSFET supplies background for the terminology and domain context used by this tool.1
How MOSFET SiO₂ Oxide Thickness works
Compute the equivalent SiO₂ gate oxide thickness from capacitance per unit area using εox = 3.9·ε0. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- tox (nm)
- Returned number in nm. Equivalent SiO₂ thickness for an ideal parallel-plate gate dielectric.
Limitations and assumptions
- Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
- Cox must be at least 5e-324.
- Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.
Alternative or Complementary approaches
Compare the estimate with measured process data, current device documentation, and a higher-fidelity circuit, field, thermal, quantum, or TCAD model when the decision requires it.
References
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MOSFET — Wikipedia contributors
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