5V/cm, find the breakdown voltage. 7. A p-n abrupt junction with NA= 1017/cm3and ND= 5x1015/cm3has τp= 0.1 µs and τ= 0.01 µs at room temperature, ni= 1010/cm3, A = 10-4cm2, µn= 801 cm2/Vs and µp= 438 cm2/Vs. (a) Calculate the junction depletion capacitance at (i) VA= 0, (ii) VA= -Vbi/2, (iii) VA= -10 V (b) Calculate the junction diffusion capacitance (ωτ< 0.1 for both the n- and the p-region) at (i) VA= Vbi/2, (ii) VA= 0.9 Vbi(iii) Calculate the junction conductance at VA= Vbi/2 and VA= 0.9 Vbi. n
University of Pennsylvania ESE 521 Semiconductor Device Physics and Technology Due: March 20, 2019 Prof. C. R. Kagan (c) Discuss which carrier type and region dominates the diffusion capacitance and the junction capacitance. Is the diffusion capacitance proportional to the forward-biased current?