Semiconductor IGZO Threshold Voltage Calculator
Extract IGZO branch threshold as actual multi-point sqrt-current gate intercept, no fixed material threshold or body-effect formula; independent branch evidence required.
Description
IGZO threshold extraction uses a selected square-root saturation-current branch.
IGZO threshold extraction uses a selected square-root saturation-current branch.1
Its voltage-axis intercept is a conditional fitted parameter whose quality depends on the measured branch.
When to use Semiconductor IGZO Threshold Voltage Calculator
Use this tool when you need to calculate the stated measurement summary or conditional model from matched observations. Prepare independently matched device or specimen measurements, units, branch selection, and model or calibration conventions.
How to use Semiconductor IGZO Threshold Voltage Calculator and understand its results
- Prepare independently matched device or specimen measurements, units, branch selection, and model or calibration conventions.
- Enter observedGateV, observedSquareRootSaturationCurrent, following the field table and calculation rules below, then run the tool.
- Read fittedThresholdGateV, fitRSquared. Use the output table and calculation rules below to interpret units, signs, crossings, and flags.
- Correct any input issues and run again. Before using a successful result, review its units, signs, evidence coverage, and stated model or reference assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedGateV | Observed gate v | list of number | Required |
| observedSquareRootSaturationCurrent | Observed square root saturation current | list of number | Required |
Use nonnegative square-root currents and aligned gate voltages in a free-intercept regression. Require a nonzero slope and return −intercept/slope with R²; a negative slope is allowed.
The regression helper accepts 2–10000 aligned finite pairs with nonzero predictor variance. It fits ordinary least squares with a free intercept using shifted coordinates; samples need not be sorted unless this tool additionally requires it. R² is clamped to [0,1] and is one for constant responses. Transformed fits use the stated log or reciprocal predictor/response basis; R² is a fit summary rather than a confidence interval.
sqrt(I)=a+bVg; Vthreshold=−a/b Read these symbols with the field meanings and branch or reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| fittedThresholdGateV | Fitted threshold gate v | number |
| fitRSquared | Fit r squared | number |
{
"input": {
"observedGateV": [
1,
2,
3
],
"observedSquareRootSaturationCurrent": [
1,
2,
3
]
},
"output": {
"fittedThresholdGateV": 0,
"fitRSquared": 1
}
}Limitations and assumptions
Measurements, branch identification, units, and model applicability must be independently established. Results do not supply universal material constants, a complete physical model, or operating-condition approval.
Missing required fields, unknown fields, wrong types, and violated calculation rules return input issues. Numeric values must be finite; nonfinite numeric outputs are rejected. Arrays must be dense, with no missing cells. Numeric lists allow at most 10000 entries, subject to smaller tool-specific bounds above.
Alternative or Complementary methods
For a related task, use Semiconductor IGZO Mobility Calculator: IGZO saturation mobility extraction connects a measured current slope with channel geometry and gate capacitance. Independently establishing the saturation branch is essential to interpreting the fitted mobility. For a complementary step, use Semiconductor OTFT Threshold Voltage Calculator: A square-root saturation-current branch can provide a fitted transistor threshold intercept. Its interpretation depends on independently selecting a suitable branch rather than assuming a universal OTFT threshold.
References
Similar or alternative tools
- Semiconductor IGZO Mobility Calculator
IGZO saturation mobility extraction connects a measured current slope with channel geometry and gate capacitance. Independently establishing the saturation branch is essential to interpreting the fitted mobility.
- Semiconductor OTFT Threshold Voltage Calculator
A square-root saturation-current branch can provide a fitted transistor threshold intercept. Its interpretation depends on independently selecting a suitable branch rather than assuming a universal OTFT threshold.