Patent Document ID: 20160097677
Application ID: 14505373
Patent Flag: 0

Claim One:
1. A method of spectroscopic metrology, the method comprising: obtaining a training spectra set from a grid scan of a training target, wherein the grid scan of the training target is performed using a spectroscopic metrology device with incident light having a measurement spot size, wherein the training spectra set comprises spectra from a first set of grid nodes in the grid scan; performing a sparse sampling of the grid scan of a measurement target using the spectroscopic metrology device with the incident light having the measurement spot size to acquire a measurement spectra set, wherein the measurement spectra set comprises spectra from a second set of grid nodes in the grid scan, wherein the first set of grid nodes and the second set of grid nodes are different; performing a deconvolution of a combination of the measurement spectra set and the training spectra set to produce an estimated spectrum of the measurement target that is an estimate of a spectrum from the measurement target produced with the incident light having an effective measurement spot size that is smaller than the measurement spot size; and determining one or more characteristics of the measurement target using the estimated spectrum.