How to Calculate Depth of Focus?
Depth of Focus calculator uses Depth of Focus = Proportionality Factor*Wavelength in Photolithography/(Numerical Aperture^2) to calculate the Depth of Focus, The Depth of Focus is defined as a critical parameter that influences the tolerance to variations in the height of the semiconductor wafer. It's the range of distances in front of and behind the focal plane where objects appear sufficiently sharp in an image. Depth of Focus is denoted by DOF symbol.
How to calculate Depth of Focus using this online calculator? To use this online calculator for Depth of Focus, enter Proportionality Factor (k_{2}), Wavelength in Photolithography (λ_{l}) & Numerical Aperture (NA) and hit the calculate button. Here is how the Depth of Focus calculation can be explained with given input values -> 1.3E+12 = 3*2.23E-07/(0.717^2).