Question: For the substrate pnp structure shown in Fig. 2.36 a, calculate IS, C je , C Î¼ , and Ï F .Assume the doping profiles

For the substrate pnp structure shown in Fig. 2.36 a, calculate IS,C_je,C_Î¼, andÏ„_F.Assume the doping profiles are as shown in Fig. 2.17.

Figure 2.36 (a)

Distance, Substrate um 120- 110- 100- 50 10 Emitter Base Emitter contact contact contact п-type epi layer p-type substr

Figure 2.17

nt In Bo n* Impurity concentration, cm-3 (cross section A-A') 1021 Emitter 1020 diffusion (Np) 1019 (Np) Buried layer 10

Distance, Substrate um 120- 110- 100- 50 10 Emitter Base Emitter contact contact contact -type epi layer p-type substrate collector nt In Bo n* Impurity concentration, cm-3 (cross section A-A') 1021 Emitter 1020 diffusion (Np) 1019 (Np) Buried layer 1018 Substrate background concentration (NA) 1017 Base (NA) diffusion 1016 1015 2.5 3 57 9/ 10 Epitaxial layer background concentration 15 20 1014 1013 (Np) x Kum)

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