A phosphorus diffusion has a surface concentration of 5 x 10^18/cm^3,and the background concentration of the p type wafer is 1 x 10^15/cm^3.The Dt product for the diffusion is 10^-8 cm^2.
a)Find the junction depth for a Gaussian distribution.
b)Find the junction depth for an erfc profile.
c)What is the sheet resistance of the two diffusions?
d)Draw a graph of the two profiles.