Multi-nozzle ink jet head

A multi-nozzle ink jet head having a plurality of nozzles that eject ink, comprising:

• a nozzle plate in which are formed said nozzles;
• an ink chamber forming member in which are formed a plurality of ink chambers communicating with said nozzles;
• a metal mask layer that is provided on a face of said ink chamber forming member for forming said ink chambers;
• and
• a plurality of energy generating parts that apply energy to said ink chambers for ejecting ink from said nozzles, said energy generating parts including:
• a common electrode;
• a plurality of energy generating layers that are provided on said common electrode in correspondence with said ink chambers;
• and a plurality of individual electrode parts that are provided on said energy generating layers in correspondence with said ink chambers,
• wherein said common electrode faces to a face of said ink chamber forming member opposite to said face provided with said metal mask layer.

A multi-nozzle ink jet head having a plurality of nozzles that eject ink, comprising:

• a nozzle plate in which are formed said nozzles;
• an ink chamber forming member in which are formed a plurality of ink chambers communicating with said nozzles;
• and
• a metal mask layer that is provided on a face of said ink chamber forming member for forming said ink chambers,
• wherein said metal mask layer is embedded in said face of said ink chamber forming member.

A multi-nozzle ink jet head having a plurality of nozzles that eject ink, comprising:

• a nozzle plate in which are formed said nozzles;
• an ink chamber forming member in which are formed a plurality of ink chambers communicating with said nozzles;
• a plurality of energy generating parts that apply energy to said ink chambers for ejecting ink from said nozzles, said energy generating parts including:
• a common electrode;
• a plurality of energy generating layers that are provided on said common electrode in correspondence with said ink chambers;
• and a plurality of individual electrode parts that are provided on said energy generating layers in correspondence with said ink chambers;
• a plurality of wiring patterns that are provided on a first face of said ink chamber forming member facing said energy generating parts and are for applying driving signals to said energy generating parts, said wiring patterns including:
• a wiring pattern for said common electrode;
• and a plurality of wiring patterns for said individual electrode parts;
• a metal mask layer that is provided on a second face of said ink chamber forming member for forming said ink chambers, said second face being opposite to said first face;
• a first path that passes through at least said ink chamber forming member;
• a first electrically conductive layer that is provided in said first path for electrically connecting said metal mask layer and said wiring pattern for said common electrode;
• a plurality of second paths that pass through at least said energy generating layers in correspondence with said individual electrode parts;
• a second electrically conductive layer that is provided in each of said second paths for electrically connecting each of said individual electrode parts and each of said wiring patterns for said individual electrode parts;
• and
• a third electrically conductive layer that is provided in each of said ink chambers for electrically connecting said metal mask layer and said common electrode.