Image sensor as a three-channel spectrometer with application to in situ monitoring of wet etching

A three-channel spectrometer is constructed with a 460 nm high brightness light-emitting diode (LED) source (250 mW peak optical power output, 1 mm sq, 150 μm thick) and a red-green-blue (RGB) image sensor (3 × 4 mm, 1 mm thick) for purposes of a small form factor spectrometer to monitor reflectance...

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Published in:Review of scientific instruments 2011-07, Vol.82 (7), p.075103-075103-7
Main Authors: Gerling, John, Cheung, Nathan W.
Format: Article
Language:English
Subjects:
Aluminum - chemistry
Copper - chemistry
Spectrum Analysis - methods
Time Factors
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description A three-channel spectrometer is constructed with a 460 nm high brightness light-emitting diode (LED) source (250 mW peak optical power output, 1 mm sq, 150 μm thick) and a red-green-blue (RGB) image sensor (3 × 4 mm, 1 mm thick) for purposes of a small form factor spectrometer to monitor reflectance/emission spectra from chemical wet etching experiments. The linearity and spectral response of the RGB image sensor is characterized and a three-channel spectral model is fitted to the extracted spectral response. We use this information to quantify time developments of the RGB image sensor outputs for in situ copper and aluminum etching experiments in terms of three defined spectral bands.
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source American Institute of Physics (AIP) Publications; American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects Aluminum - chemistry
Copper - chemistry
Spectrum Analysis - methods
Time Factors
title Image sensor as a three-channel spectrometer with application to in situ monitoring of wet etching
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