Patent ID: 8354142

Claim:
A method for coating a polyimide layer, comprising: placing a substrate on a print table; arranging a plurality of inkjet heads in parallel with each other over the substrate, each of the inkjet heads having a jetting surface with a plurality of nozzles; jetting polyimide liquid onto the substrate from the nozzles while scanning the inkjet heads over the substrate; wiping the jetting surfaces of the inkjet heads by moving a wiper from a first one of the inkjet heads to a last one of the inkjet heads along the print table while the wiper contacts the jetting surfaces so that a residue on the jetting surfaces is removed; and rotating the wiper on a supporter so that the wiper is dipped into a cleaning liquid in a cleaning liquid supply tank after finishing the wiping operation, thereby removing a residue on the wiper, wherein the supporter supports the wiper.