Chapter 1, Problem 1.14P

(a) The applied conductivity of a silicon material must be $\sigma =1.5{\left(\Omega -\text{cm}\right)}^{-1}$ . If ${\mu }_n\text{=1000}{\text{cm}}^{\text{2}}/\text{V}-\text{s}$ and ${\mu }_p\text{=375}{\text{cm}}^{\text{2}}/\text{V}-\text{s}$ , what concentration of donor atoms must be added? (b) The required conductivity of a silicon material must be $\sigma =0.8{\left(\Omega -\text{cm}\right)}^{-1}$ . If ${\mu }_n\text{=1200}{\text{cm}}^{\text{2}}/\text{V}-\text{s}$ and ${\mu }_p\text{=400}{\text{cm}}^{\text{2}}/\text{V}-\text{s}$ , what concentration of acceptor atoms must be added?