Patent ID: 7264909

Claim:
A charged beam exposure method comprising: selecting a plurality of exposure patterns to be used for exposure from an exposure mask having a reference pattern whose exposure position has been corrected beforehand; forming a charged reference pattern and a plurality of charged exposure patterns on a to-be-exposed insulating substrate by projecting a charged beam with a first incident energy onto the insulating substrate via said reference pattern and said selected exposure patterns to be corrected; forming electron signal images for said charged reference pattern and said plurality of charged exposure patterns based on charged particles including secondary electrons from said exposed insulating substrate by scanning said exposed substrate with a charged beam with a second incident energy lower than said first incident energy; creating, based on said electron signal images, correction exposure parameters including at least one of position, focal point, astigmatism, rotation, and magnification for all of said selected exposure parameters to be corrected; correcting exposed exposure patterns using said exposure parameters; and exposing said exposure patterns on said exposed substrate with said charged beam so as to reflect the corrected exposure parameters.