Patent ID: 8119186
Filing Date: 2012-02-21
Classification: B41J,H01L

Abstract:
1. A liquid coating method performed by ejecting droplets of a liquid through a plurality of nozzles to a plurality of coating regions on a substrate, the method comprising: obtaining nozzle information including the ejection amount of a droplet of the liquid ejected through each nozzle; producing arrangement information for disposing the liquid according to which a plurality of droplet groups each including at least one droplet of the liquid are disposed in each coating region while the plurality of nozzles and the substrate are scanned for relative movement; performing operation to calculate the coating amount of the liquid to be applied to each coating region according to the nozzle information and the arrangement information; dividing the variation in coating amount into a plurality of sections; calculating the difference between a typical value of each section and a predetermined coating amount and setting the difference as the adjustment amount adjusted from the predetermined coating amount in the corresponding section: assigning the adjustment amount of each of the sections requiring adjustment to the droplet groups so that the assigned adjustment amounts vary from one droplet group to another; setting a plurality of driving signals for each droplet groups so that combinations of the driving signals give coating amounts that have taken the assigned adjustment amounts into account; and driving a selected nozzle with driving signals selected from the combinations to eject the liquid to each of the coating regions through the nozzle while the scanning is performed according to the arrangement information.