Patent ID: 7242014

Claim:
A charged particle beam drawing equipment comprising: a charged particle beam source configured to emit a charged particle beam; a first shaping aperture mask provided below the charged particle beam source and comprising a plurality of opening portions which include a first opening portion for rotation adjustment; a second shaping aperture mask provided below the first shaping aperture mask and comprising a plurality of opening portions which include a second opening portion for rotation adjustment; a detection section configured to detect an intensity distribution of charged particle beam, the intensity distribution being in a plane substantially parallel to the second shaping aperture mask, the charged particle beam being emitted from the charged particle beam source and passing through the first and second opening portions for rotation adjustment; a rotation angle control section configured to control a relative rotation angle between the first shaping aperture mask and the second shaping aperture mask by rotating the first shaping aperture mask or the second shaping aperture mask; an acquisition section configured to acquire a relative rotation angle between the first shaping aperture mask and the second shaping aperture mask such that a deviation in relative rotation angle between the first shaping aperture mask and the second shaping aperture mask falls within a predetermined range on the basis of a plurality of detection results obtained by changing the relative rotation angle between the first shaping aperture mask and the second shaping aperture mask a plurality of times by the rotation angle control section and by detecting the charged particle beam by the detection section for each rotation angle; and an instruction section configured to provide an instruction to the rotation angle control section such that the relative rotation angle between the first shaping aperture mask and the second shaping aperture mask is to be the acquired rotation angle.