Importance

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Abstract

In the manufacture of an ink jet print head which ejects ink from ink jet grooves through nozzles by applying voltage to walls of the ink jet grooves that are formed of a piezoelectric material so as to deform the walls, a plurality of ejection factors, such as a groove width, groove depth, width of partition walls, and a piezoelectric constant of the piezoelectric material, which influence ejection of the ink, are selected as a combination and controlled so that the ink is ejected from the print head in a desired ejection state. When the groove depth and groove width of the jet ink grooves, for example, are selected as the combination of the ejection factors, the groove depth is corrected or controlled according to the groove width. Accordingly, the tolerances or allowable ranges of the ejection factors can be increased when manufacturing actuator substrates capable of ejecting ink in a desired ejection state, with a result of an improved yield of print heads.

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First Claim