Question$-02$

The pre$-$exponential and activiation energy for the diffusion of Phosporus in Silicon wafer are $1\mathrm{.}1{10}^{-4}\frac{m^2}{s}$&$3\mathrm{.}40e\frac{V}{?}$ atom, respectively.

$($a$)$ Calculate the diffusion co$-$efficient for Phosphorus in Silicon Wafer at $1200C.$

$($b$)$ What time will be required at $950C$ to produce the same diffusion result $($in terms of concentration at a specific point$)$ as for $2\mathrm{.}5h$ at $1200C.$

$[$Diffusitivity at $950C$ is $5\mathrm{.}76{10}^{-17}$&$k=8\mathrm{.}62{10}^{-5}e\frac{V}{?}$ atom.K$]$