Patent ID: 6586952
Filing Date: 2003-07-01
Classification: G01R,H01J

Abstract:
A method of inspecting a semiconductor device comprising the steps of:irradiating the same location of a face of a semiconductor wafer in the midst of a preceding step of semiconductor device producing process with an electron beam by a plurality of times at predetermined intervals; detecting a signal of electrons secondarily generated from the face of the wafer by the electron beam; visualizing and displaying the signal of the electrons detected by irradiating the electron beam at and after an n-th time previously designated in the plurality of times of irradiations; and monitoring a charge alleviated state of the face of the wafer from information of a displayed image of the electron beam and specifying a location of causing retention failure in the face of the wafer by a degree of the charge alleviated state, wherein the intervals for irradiating the electron beam are shorter than a charge alleviating time in the face of the wafer.