Problems encountered in the conventional inspection method and the
conventional apparatus adopting the method are solved by the present
invention using an electron beam by providing a novel inspection method
and an inspection apparatus adopting the novel method which are capable
of increasing the speed to scan a specimen such as a semiconductor
wafer.The inspection novel method provided by the present invention
comprises the steps of: generating an electron beam; converging the
generated electron beam on a specimen by using an objective lens;
scanning the specimen by using the converged electron beam; continuously
moving the specimen during scanning; detecting charged particles
emanating from the specimen at a location between the specimen and the
objective lens and converting the detected charged particles into an
electrical signal; storing picture information conveyed by the electrical
signal; comparing a picture with another by using the stored picture
information; and detecting a defect of the specimen.