1. The problem statement, all variables and given/known data The equations provided require the oxide permittivity (εox)as well as the oxide thickness (tox) to determine the gate oxide capacitance per unit squared (Cox). How to solve this? 2. Relevant equations In triode region: ID = μn * Cox * W/L * ((VGS-Vth)* VDS - VDS2/2 In saturation = μn * Cox * 1/2 * W/L * (VGS-Vth)2 * (1 + λ*VDS) Cox = εox / tox 3. The attempt at a solution Without εox, I can't get Cox; I can't start.