Inkjet head and its manufacturing method

A manufacturing method of an inkjet head, which jets, by shear deformation of a partition wall, an ink in an ink flow path constructed with the partition wall of a channel board and a cover board, comprising:

• forming a metal electrode on a surface of the partition wall;
• coating an adhesive agent on the cover board;
• superposing the cover board onto an upper end surface of the partition wall under the state satisfying the following condition 1, so that the ink flow path is formed with the partition wall and the cover plate;
• and
• pressing the channel board and the cover board under the state satisfying the following condition 1 all the time, and experiencing the following condition 2, so that an upper end surface of the partition wall and the cover plate are bonded,
• (Condition 1)
• Hardness of the adhesive agent measured by a viscoelasticity measuring apparatus is not less than 105 dyne/cm2.
• (Condition 2)
• Hardness of the adhesive agent measured by a viscoelasticity measuring apparatus is not less than 105 dyne/cm2 and not greater than 109 dyne/cm2,