Patent ID: 7705327

Claim:
A charged particle beam lithography apparatus comprising: an irradiation unit operative to irradiate a charged particle beam; a deflector operative to deflect the charged particle beam; a stage disposing thereon a workpiece for pattern writing and a substrate with a plurality of marks being regularly laid out in an entire area substantially equal to a pattern writing region of the workpiece, said substrate being disposed at a position on the stage different from a position of said workpiece on the stage; a measurement unit operative to measure positions of the plurality of marks on said stage through scanning of the charged particle beam by said deflector; a coefficient calculation unit operative to use an equation of approximation for correction of a position deviation occurring due to a hardware configuration of the apparatus to perform fitting of a deviation amount of the position of each mark by a coordinate system of said apparatus to thereby calculate more than one coefficient of the approximation equation with the fitting applied thereto; and a storage unit operative to perform overwrite storing whenever said coefficient calculation unit calculates said coefficient.