The charge is positive what is the flatband voltage

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Unformatted text preview: type silicon / SiO2 interface is N it = 1012 cm −2 . The charge is positive. What is the flatband voltage, Vfb? Assume Tox=10nm. Don’t use the Tox calculated in (a). Cox = ε ox Tox = 3.45 ×10−7 F cm 2 −19 12 1 qN ox 1.6 × 10 C ⋅10 cm 2 = 0.46V = Cox 3.45 ×10−7 F 2 cm Q qN 5 × 1017 Qox − = −1.02 − ox = −1.48 V fb = Φ g − Φ s − ox = −0.56V − 0.026V ⋅ ln 10 10 Cox Cox Cox (c) [5pts] Assume there are 3 electron traps (electron states), A, B, and C in the SiO2, as shown below. A is 0.5eV above Ef; B is located at Ef; C is 0.5eV belo...
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