Patent ID: 7926177

Claim:
A method of forming a hydrophobic layer on a nozzle plate of an inkjet printhead, the nozzle plate having inner and outer surfaces and a plurality of nozzles having nozzle openings and inner nozzle surfaces, the method comprising: forming a first layer of a predetermined material on the outer surface of the nozzle plate to cover the nozzle openings; forming a second layer of a predetermined material on the inner surface of the nozzles plate to cover the inner nozzle surfaces and the nozzle openings; removing the first layer to uncover the outer surface of the nozzle plate and to expose portions of the second layer through the nozzle openings; forming the hydrophobic layer on the outer surface of the nozzle plate, the nozzle openings, and the exposed portions of the second layer; and removing the second layer and the portion of the hydrophobic layer that was formed on the exposed portions of the second layer.