Patent Number: 
Section: claims

1. A drawing apparatus which draws a circuit pattern and a mark on a substrate with a charged particle beam based on drawing data, the apparatus comprising:a storage unit configured to store pattern data representing the circuit pattern and mark data representing the mark, respectively;an obtaining unit configured to obtain information associated with a positioning accuracy of the charged particle beam relative to the substrate;a determination unit configured to determine a drawing region for the mark relative to the circuit pattern based on the obtained information; anda generation unit configured to generate combined data by combining the pattern data and the mark data respectively stored in the storage unit such that the mark is drawn in the drawing region determined by the determination unit and convert the combined data into bitmap data, thereby generating the drawing data. 2. The apparatus according to claim 1, further comprising:a holding unit configured to store region information indicating a region, in which the mark can be drawn, on the substrate,wherein the determination unit is configured to determine the drawing region for the mark from the region indicated by the stored region information. 3. The apparatus according to claim 1, wherein the obtaining unit is configured to obtain flatness information indicating a flatness of the substrate as the information associated with the positioning accuracy, andthe determination unit is configured to determine the drawing region for the mark from a region in which the flatness falls within a tolerance based on the obtained flatness information. 4. The apparatus according to claim 3, wherein the determination unit is configured to determine a shape and a dimension of the mark such that the mark is drawn in the region in which the flatness falls within the tolerance. 5. The apparatus according to claim 1, whereinthe obtaining unit is configured to obtain time information indicating an execution time of calibration of the drawing apparatus as the information associated with the positioning accuracy, andthe determination unit is configured to determine the drawing region for the mark based on the obtained time information such that the mark is drawn within a predetermined period after the execution time of the calibration. 6. The apparatus according to claim 1, whereinthe obtaining unit is configured to obtain environment information indicating an environment of the drawing apparatus as the information associated with the positioning accuracy, andthe determination unit is configured to determine the drawing region for the mark based on the obtained environment information such that the mark is drawn at a time at which the environment falls within a tolerance. 7. The apparatus according to claim 1, whereinthe obtaining unit is configured to obtain density information indicating a density of a pattern element which constitutes the circuit pattern as the information associated with the positioning accuracy, andthe determination unit is configured to determine the drawing region for the mark based on the obtained density information such that the mark is drawn in parallel with drawing of a pattern element group of which a density of a pattern element is not less than a predetermined value. 8. The apparatus according to claim 1, further comprising:a selection unit configured to select a pattern element which constitutes the circuit pattern from the pattern data,wherein the determination unit is configured to determine the drawing region for the mark such that the mark is drawn in parallel with drawing of the selected pattern element. 9. The apparatus according to claim 1, further comprising:a second storage unit configured to store mark region information indicating a mark drawing region with respect to each layer formed on the substratewherein the determination unit is configured to determine the drawing region for the mark based on the stored mark region information such that the drawing region for the mark does not overlap a region of a mark already formed on the substrate. 10. The apparatus according to claim 1, wherein the mark includes an alignment mark used for an alignment and overlay between the circuit pattern and another circuit pattern different from the circuit pattern, or an inspection mark used in inspecting an overlay result between the circuit pattern and another circuit pattern different from the circuit pattern. 11. A method of manufacturing an article, the method comprising:performing drawing on a substrate using a drawing apparatus;developing the substrate on which the drawing has been performed; andprocessing the developed substrate to manufacture the article,wherein the drawing apparatus draws a circuit pattern and a mark on the substrate with a charged particle beam based on drawing data,the apparatus includinga storage unit configured to store pattern data representing the circuit pattern and mark data representing the mark, respectively;an obtaining unit configured to obtain information associated with a positioning accuracy of the charged particle beam relative to the substrate;a determination unit configured to determine a drawing region for the mark relative to the circuit pattern based on the obtained information; anda generation unit configured to generate combined data by combining the pattern data and the mark data respectively stored in the storage unit such that the mark is drawn in the drawing region determined by the determination unit and convert the combined data into bitmap data, thereby generating the drawing data.