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Engineering, 15.04.2020 17:28 nadarius2017

A silicon wafer originally containing 1 P atom for every 10 million Si atoms is treated to produce a surface concentration of 400 P atoms per 10 million silicon atoms. Calculate the absolute value of the concentration gradient in atomic percent/cm and atoms/m^3/m. Silicon is diamond cubic with lattice parameter 5.4307 Angstroms.

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