Patent ID: 8550596

Claim:
A method of producing a nozzle plate for an inkjet head, said method comprising: preparing a nozzle plate which comprises a substrate and ink ejecting holes formed in the substrate and has an ink-repellent layer formed on an ink ejecting side surface of the nozzle plate; and selectively removing portions of the ink-repellant layer around the ink ejecting holes to expose portions of the nozzle plate around the ink ejecting holes, wherein the selectively removing of the portions of the ink-repellant layer around the ink ejecting holes comprises filling said ink ejecting holes with treatment chemical to selectively decrease the mechanical strength of the portions of the ink-repellant layer around the ink ejecting holes, and selectively removing the portions of the ink-repellant layer around the ink ejecting holes, where the mechanical strength is selectively decreased, by a mechanical removing device.