This letter describes an improved formula for the extraction of the polysilicon doping from the C-V characteristic of MOS transistors. Analytical approximations are presented for the inversion layer contribution, which was neglected in previous work. The new approach returns an estimate error smaller than 10% when the full substrate and poly quantization are accounted for. Practical application to experimental data is also addressed.
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Spinelli et al. (2001) studied this question.
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