Ink-jet print head and method thereof

A method in an ink-jet print head, the method comprising:

• forming a substrate having a channel supplying ink;
• forming a nozzle plate on the substrate to include a nozzle corresponding to the channel;
• forming a heat element in the nozzle plate to surround the nozzle, the heat element having a first side facing the substrate and a second side opposite to the first side;
• forming a thermal conduction layer in the nozzle plate to be spaced-apart from the second side of the heat element;
• forming an intermediate insulation layer between the thermal conduction layer and the heat element;
• and
• forming a first thermal shunt in the intermediate insulation layer, the first thermal shunt spaced-apart from the heat element by a predetermined distance in a direction parallel to a major plane of the nozzle plate not to overlap the heat element, and the first thermal shunt connecting the thermal conduction layer to the substrate.

A method in an ink-jet print head, the method comprising:

• forming a membrane having a substrate and a nozzle plate formed on the substrate, wherein the forming of the nozzle plate comprises:
• forming a thermal insulation layer on the substrate;
• forming a nozzle on the nozzle plate;
• forming a heat element on a portion of the thermal insulation layer;
• forming an intermediate insulation layer on the heat element and the thermal insulation layer other than the portion of the thermal insulation layer;
• forming a thermal conduction layer on the intermediate insulation layer to be spaced-apart from the heat element;
• forming an outer layer on the thermal conduction layer;
• and
• forming a thermal bridge in the intermediate insulation layer and between the substrate and the thermal conduction layer to connect the thermal conduction layer to the substrate.