Patent ID: 8803533
Filing Date: 2014-08-12
Classification: G01R,H01L

Abstract:
1. A method of determining an interface trap density at an interface between a semiconductor and a dielectric or oxide layer disposed on a surface of the semiconductor, comprising: placing an initial electric charge on at least a portion of a surface of a dielectric or oxide layer disposed on a semiconductor, wherein placing the initial electric charge on the surface of the dielectric or oxide layer creates an accumulation state in the semiconductor, wherein placing the initial charge on the surface of the dielectric or oxide layer results in an electric charge, Q placing at least two increments of additional electric charge on the at least a portion of the surface of the dielectric or oxide layer, wherein each of the at least two increments of additional electric charge have an opposite sign as the initial electric charge, wherein after placement of the at least two increments of additional electric charge on the at least a portion of the surface of the dielectric layer the semiconductor is in depletion, wherein the electric charge, Q measuring a corresponding value of a contact potential difference voltage, V determining a dielectric capacitance, C determining a flat band voltage, V determining one or more surface barrier voltage values, V determining one or more interface trap densities, D