Patent ID: 8816276
Filing Date: 2014-08-26
Classification: H01J

Abstract:
1. An electron beam writing apparatus comprising a control unit and a writing unit having an electron optical column and a writing chamber, comprising; a stage on which a sample is placed in the writing unit; an electron gun unit, which is disposed in the electron optical column, configured to emit an electron beam; a shield plate, which is disposed between the stage and the electron optical column, configured to reduce reflected electrons or secondary electrons generated by irradiation to the sample with the electron beam from entering the electron optical column; and an electrostatic lens positioned in an axial direction of the electron beam in the electron optical column, wherein the electrostatic lens is disposed immediately above the shield plate and is supplied with negative voltage, from a voltage supply device, constantly during writing patterns on the sample, and is configured to block the reflected electrons or the secondary electrons from entering the electron optical column.