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Characterisation of III-V Semiconductors using Phase Modulated Spectroscopic Ellipsometry: InGaAs Avalanche Photodiodes
The UVISEL NIR Spectroscopic Ellipsometer provides a fast, non destructive characterisation tool which has helped to improve the manufacturing yield of APDs. The accuracy and reliability of the ellipsometric measurement has allowed replacement of the selective chemical etch used to measure the thicknesses. The UVISEL Spectroscopic Ellipsometer may also be applied to the characterisation of laser structures, photodetectors and many other complex multilayer devices.

