Method of forming hydrophobic coating layer on surface of nozzle plate of inkjet head

A method of forming a hydrophobic coating layer on a nozzle plate having a plurality of nozzles, on a completely formed inkjet head, the method comprising:

• preparing a stamp and a nozzle plate having a plurality of nozzles;
• applying a hydrophobic material to the stamp;
• bonding the hydrophobic material to the nozzle plate by moving the stamp onto the nozzle plate and heating the nozzle plate to attach the hydrophobic material of the stamp to the nozzle plate;
• and
• separating the stamp from the nozzle plate,
• wherein portions of the hydrophobic material bonded to the nozzle plate remain on the nozzle plate to form the hydrophobic coating layer on the nozzle plate, and other portions of the hydrophobic material corresponding to the nozzles of the nozzle plate remain on the stamp and are separated from the nozzle plate when the stamp is separated from the nozzle plate.

A method of forming a hydrophobic coating layer on a nozzle plate having a plurality of nozzles, without forming the hydrophobic coating layer on the inner surface of the nozzles, the method comprising:

• applying a hydrophobic material to a stamp;
• bonding the hydrophobic material of the stamp to the nozzle plate by moving the stamp into contact with the nozzle plate;
• and
• separating the stamp from the nozzle plate.