Patent ID: 6075263
Filing Date: 2000-06-13
Classification: G01R,H01L

Abstract:
A method of evaluating the surface/interface of a semiconductor, in a semiconductor device which comprises:a semiconductor substrate;a first conductive-type conductive layer formed on said semiconductor substrate;a source electrode formed on one end of the surface of said first conductive-type conductive layer and composed of a first conductive-type ohmic electrode;a drain electrode formed opposite to said source electrode on the other end of the surface of said first conductive-type conductive layer and composed of the first conductive-type ohmic electrode; anda gate electrode formed on at least one end of the surface of said conductive layer on which said source electrode or said drain electrode is not disposed, and composed of a second conductive-type ohmic electrode or a first conductive-type Schottky electrode,said method comprising the steps of:changing a voltage applied to said gate electrode and measuring a change in a value of a current flowing between said source electrode and said drain electrode in response to the change in the voltage; anddetermining the type of trap of the surface and an interface between said source electrode and said drain electrode from an amount of change in the value of the current, as a function of said voltage applied to said gate electrode.