Patent ID: 7020866
Filing Date: 2006-03-28
Classification: G03F,G06F

Abstract:
1. A mask data processor for processing mask data of a transfer mask used for forming on a semiconductor substrate a plurality of sub-chips on a region of the semiconductor substrate other than a region for forming a main chip, said mask data processor comprising: a pattern-density data generation device that processes a design data in units of said sub-chips and outputs, for application to the transfer mask, a pattern density per unit region of a pattern graphic contained in the individual processes for forming said sub-chips, as pattern density data in units of said sub-chips, wherein said pattern-density data generation device includes: a data execution part that creates said mask data by receiving the design data split in units of said sub-chips and mask data creation specification data defining at least the specification of said mask data; a graphic area calculation part that calculates the area of said pattern graphic in the individual processes for forming said sub-chips contained in said mask data; and a pattern-density data calculation part that calculates the pattern density per unit region of said pattern graphic as the pattern density data in units of said sub-chips.