Patent ID: 7280933

Claim:
A method for forming a pattern on a substrate, comprising the steps of: ejecting liquid drops from an ejection head having nozzles onto a reference plate on which a plurality of blocks are defined, a plurality of target positions being defined in each block, the target positions being arranged in a plurality of rows in a predetermined pattern; detecting an amount of a displacement between the target positions and the positions at which the liquid drops have actually landed; determining a relative positional error relative to the ejection head for each of the plurality of rows of the target positions based on the amount of the displacement; determining a correction value for each of the plurality of rows based on the relative positional error; and sequentially changing a relative position of the substrate and the ejection head based on the correction values while ejecting the liquid drops onto the substrate, wherein the target positions are based on a plurality of marks formed on the reference plate; and wherein a spacing between the target positions in a first direction is approximately twice a spacing between nozzle holes of the ejection head.