Using the values in Table $6\mathrm{.}3$ for surface diffusion on $(100)$ Si$,$ calculate the values for Ds $($cm$^2/$sec$)$ and $\backslash$tau $\_(0)($sec$)$ at $800\backslash$deg C$.$ How long would it take for an atom to diffuse $10-5$ cm $?10-6$ cm$?$ Compare these values with ${}_0.$

TABLE $6\mathrm{.}3$ Growth Parameters on $(100)$ Si with $W=4\mathrm{.}5eV,=a=0\mathrm{.}543nm,$ v$=10^13/$sec$,$ Gs $=0\mathrm{.}5$ eV and Gdes$=1\mathrm{.}1$ eV

$-25\backslash$deg C kT $($eV$)$: $0\mathrm{.}0257,$ Ds $($cm$^2/$sec$)$: $5\mathrm{.}2$x$10^-11,$ t$0($sec$)$: $3\mathrm{.}8$x$10^5,\backslash$lambda $\backslash$epsi $(\backslash$mu m$)$: $44\mathrm{.}4$

$-300\backslash$deg C kT $($eV$)$: $0\mathrm{.}0494$ Ds $($cm$^2/$sec$)$: $5\mathrm{.}9$x$10^-7,$ t$0($sec$)$: $4\mathrm{.}7$x$10^-7,\backslash$lambda $\backslash$epsi $(\backslash$mu m$)$: $0\mathrm{.}16$

$-500\backslash$deg C kT $($eV$)$: $0\mathrm{.}0666,$ Ds $($cm$^2/$sec$)$: $58\mathrm{.}1$x$10^-6,$ t$0($sec$)$: $1\mathrm{.}4$x$10^-6,\backslash$lambda $\backslash$epsi $(\backslash$mu m$)$: $0\mathrm{.}033$

$-700\backslash$deg C kT $($eV$)$: $0\mathrm{.}0838,$ Ds $($cm$^2/$sec$)$: $3\mathrm{.}8$x$10^-5,$ t$0($sec$)$: $5\mathrm{.}0$x$10^-8\backslash$lambda $\backslash$epsi $(\backslash$mu m$)$: $0\mathrm{.}014$