Use this semiconductor calculation for first-order device, material, fabrication, interconnect, packaging, or reliability estimates when every coefficient and unit convention is known.

Bulk critical thickness (nm)

Required number in nm. Critical thickness of the unbalanced bulk layer.

Residual strain fraction

Required number. Fraction of the original mismatch strain left after balancing; 1 means no compensation.

The cited overview of Semiconductor device supplies background for the terminology and domain context used by this tool.^[1]

Estimate strain-balanced critical thickness by scaling the unbalanced value inversely with the nonzero residual strain fraction. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Effective critical thickness (nm)

Returned number in nm. Effective critical thickness with strain balancing.

• Material composition, geometry, process history, temperature, electric field, bias, interfaces, parasitics, and fitted parameter ranges can invalidate a compact semiconductor model.
• Residual strain fraction must be at least 0.
• Residual strain fraction must be no greater than 1.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

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.

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