Method of fabricating ink-jet head

A method of fabricating an ink-jet head having a nozzle that ejects ink, an ink passage connecting the nozzle and an ink supply source a plurality of flat plates having the ink passage formed inside in a lamination structure, said method of fabricating an ink-jet head comprising:

• (A) forming a first photosensitive resin layer on one face of a metal flat plate of the plurality of flat plates;
• (B) forming a second photosensitive resin layer on an opposite face of metal flat plate;
• (C) selectively exposing the first photosensitive resin layer by using a mask formed with a pattern corresponding to a first passage partially constituting the ink passage;
• (D) removing an exposed portion or an unexposed portion of the first photosensitive resin layer;
• (E) forming the first passage by etching the flat plate to form a shape corresponding to a removed portion of the first photosensitive resin layer;
• (F) selectively exposing the second photosensitive resin layer by using a mask formed with a pattern corresponding to a second passage partially constituting the ink passage and a filter;
• (G) forming the second passage connected to the first passage and the filter by removing an exposed portion or an unexposed portion of the second photosensitive resin layer;
• and
• (H) laminating the flat plate processed by the steps of (A) through (G) onto other flat plates of the plurality of flat plates.