Patent ID: 6429425
Filing Date: 2002-08-06
Classification: G01B,G03F,H01J

Abstract:
A method of forming a calibration standard to adjust a micro-bar of an electron microscope, the method comprising:forming a photoresist layer on a semiconductor wafer; exposing a predetermined region of the photoresist layer to a light of a specific wavelength; performing a resist stripping process to remove portions of the photoresist layer in the predetermined region to make the periphery of the predetermined region of the photoresist layer have a vertical side wall with a periodic wave shape similar to a sine wave, and the wavelength of the periodic wave shape is determined by the wavelength of the light and the refraction rate of the photoresist layer; and using the wavelength of the periodic wave shape on the vertical side wall to be the calibration standard to adjust the micro-bar of the electron microscope.