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(Solved): 5.46 Electronic devices found in integrated circuits are composed of very high purity silicon to w ...
5.46 Electronic devices found in integrated circuits are composed of very high purity silicon to which has been added small and very controlled concentrations of elements found in Groups IIIA and VA of the periodic table. For Si that has had added \( 6.5 \times 10^{21} \) atoms per cubic meter of phosphorus, compute (a) the weight percent and (b) the atom percent of \( \mathrm{P} \) present.
Expert Answer
To answer the question we need the Density of Pure Si atom which is 2.33 g / cm3 Mass of Si per cubic meter = 2.33 x 1000000 g / m3 = 2330000 g /m3 % weight = Mass of P / ( Mass of P + Mass of Si ) x 10