Calculating Silicon Nitride Layer Thickness

This lecture discusses how to calculate the thickness of a silicon nitride layer by using synfilm interference. By analyzing the reflection of light on different materials, such as air, silicon nitride, and glass, the instructor explains the optical path difference and the formula to determine the layer's thickness. Through a series of calculations involving refractive indexes and angles, the lecture demonstrates how to find the possible values of the silicon nitride layer thickness based on the observed light green color and the interference effects.