| 摘要 |
PROBLEM TO BE SOLVED: To provide an inkjet head using heat energy as energy used for discharging ink, wherein kogations deposited on a heat application portion in contact with ink is surely and uniformly removed. SOLUTION: An upper protective layer 107 is arranged in an area including the heat application portion 108 so that it is electrically connected so as to serve as an electrode which generates an electrochemical reaction with ink. The upper layer protective layer is formed of a material containing a metal to be dissolved by the electrochemical reaction, and forming, on heating, no oxide film to hinder the dissolution. A reliable electrochemical reaction is thereby produced to dissolve the surface layer of the upper protective layer, which reliably and uniformly removes kogations on the heat application portion. COPYRIGHT: (C)2008,JPO&INPIT
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