Ink-jet head

An inkjet head, comprising:

• a plurality of nozzles that eject ink;
• a first flat plate layer including at least one flat plate formed with an array of pressure chambers that communicate with a corresponding one of the nozzles;
• a second flat plate layer including at least one flat plate formed with a common ink chamber having a shape elongated in a direction of the array of the pressure chambers;
• an ink supply passage connecting the common ink chamber and an ink supply source;
• a flat plate member that is a thin film disposed between the first flat plate layer and the second flat plate layer;
• a restriction flow passage that is formed at the flat plate member, communicates at one end with a corresponding one of the pressure chambers and at another end with the common ink chamber, and controls a flow of the ink between a corresponding one of the pressure chambers and the common ink chamber;
• a first filter formed at the flat plate member that filters the ink in a thickness direction of the flat plate member;
• a second filter formed at the flat plate member, separately from the first filter, that filters the ink in a surface direction thereof, and
• a damper chamber formed at a flat plate facing the flat plate member on a side opposed to the common ink chamber.

An ink-jet head, comprising:

• a plurality of nozzles that eject ink;
• a first flat plate layer including at least one flat plate formed with an array of pressure chambers that communicate with a corresponding one of the nozzles;
• a second flat plate layer including at least one flat plate formed with a common ink chamber having a shape elongated in a direction of the array of the pressure chambers;
• an ink supply passage connecting the common ink chamber and the ink supply source;
• a flat plate member disposed between the first flat plate layer and the second flat plate layer;
• a restriction flow passage, formed at the flat plate member, that communicates one end thereof to the pressure chamber, communicates another end thereof to the common ink chamber and controls a flow of the ink between the pressure chamber and the common ink chamber;
• and
• a filter formed inside of the restriction flow passage.