Patent ID: 7649633
Filing Date: 2010-01-19
Classification: G01N

Abstract:
1. A method for measuring a dielectric constant of a thin film sample, comprising: irradiating the thin film sample with light at a first incident angle, whereby the light undergoes multiple internal reflections within the thin film sample; measuring light that has transmitted through or reflected on the thin film sample following said multiple internal reflections; and taking a ratio of a transmission spectrum or reflection spectrum through or upon a combination of the thin film and a substrate to a transmission spectrum or reflection spectrum through or upon the substrate only as a relative transmittance or relative reflectance, respectively; determining the relative transmittance or relative reflectance with respect to frequency over a range of frequencies; determining a complex dielectric constant of the thin film sample based upon the relative transmittance or relative reflectance with respect to frequency over a range of frequencies.