Patent ID: 8080849

Claim:
A system for characterizing a film, the system comprising: a structure having: a substrate; and a pseudo substrate positioned below the film and over the substrate, wherein the pseudo substrate includes an optical mirror for enhancing an optical response, wherein the optical mirror includes a Bragg reflector having at least one period, the at least one period including: a layer formed substantially of silicon; and a layer formed substantially of thermal silicon dioxide underlying the layer formed substantially of silicon, wherein a thickness of the layer formed substantially of silicon and a thickness of the layer formed substantially of thermal silicon dioxide have a thickness relationship according to: d L *n L =d H *n H =λ/4; where d H is a thickness of the layer formed substantially of silicon, d L is a thickness of the layer formed substantially of thermal silicon dioxide, where n H is an index of refraction of the layer formed substantially of silicon, n L is an index of refraction of the layer formed substantially of thermal silicon dioxide, and λ is a wavelength corresponding to a reflectance maxima; and a system for characterizing a parameter of the film by applying a light source to the film and analyzing the optical response.