十、依據「食品安全管制系統準則」之規定，食品工廠實施教育訓練之對象為何？

1. The electron and the hole concentrations in a silicon sample are shown below. The cross-sectional area of the sample is 2x104 μm2. Determine the total diffusion current versus distance x for 0≤x≤0.005cm.  (10%)

(a) Determine the donor and acceptor concentrations. (5%)

(b) What type of material would this yield? (5%)

(c) Calculate the electron and hole concentrations. (5%)

(d) Determine the position of the Fermi level with respect to the intrinsic Fermi level.

(a) Calculate the maximum electric field at the collector-base junction. (5%)

b) Calculate the collector-base depletion capacitance per unit area. (5%)

(c) Calculate the depletion layer width in base. (5%)

(d) Explain the base width modulation and state its consequences. (5%)

4. Answer the following questions about MOS capacitor. (a) Explain the flat-band voltage. (5%)( b) Consider a n+polysilicon-SiO2-Si capacitor with a p-type silicon substrate doped to NA = cm, a silicon dioxide insulator with a thickness of 300 . The metal-semiconductor work function diference is -0.98 V. The fixed charge within the SiO2-Si interface Q/q = 4✖The dielectric constant of SiO2 is 3.9. Calculate the flat-band voltage. (15%)

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