Patent ID: 7011915
Filing Date: 2006-03-14
Classification: B82Y,H01J,Y10S

Abstract:
1. An exposure parameter obtaining method comprising: selecting a plurality of exposure patterns to be used for exposure from an exposure mask with a reference pattern whose exposure parameter has been known beforehand; forming a charged reference pattern and a plurality of charged exposure patterns at a surface region of a to-be-exposed insulation substrate by projecting a charged beam with a first incident energy using the reference pattern and all of the selected exposure patterns to be corrected; forming electron signal images for the charged reference pattern and the plurality of charged exposure patterns on the basis of charged particles including secondary electrons by scanning the surface of the insulation substrate with a charged beam with a second incident energy lower than the first incident energy; and creating, on the basis of the electron signal images, the exposure parameters including at least one of position, focal point, astigmatism, rotation, and magnification for all of the selected exposure patterns to be corrected.