Mita Industrial Co., Ltd.

Yoko Ohba

Takeshi Watanabe

Kenichi Satake

Kikunosuke Tsuji

Koichi Baba

Setsuo Hori

A printing head for an ink jet printer is provided with a plurality of ink jet sets. Each of the ink jets. Each of the ink jets includes an ink nozzle through which ink is ejected; a pressure chamber communicated with the ink nozzle and having a diaphragm made of a flexible plate; and a piezoelectric member bonded on an outside of the diaphragm for deforming the diaphragm to eject ink through the ink nozzle from the pressure chamber. The piezoelectric member includes a layer, having titanium an upper PZT layer chemically bonded on an upper surface of the titanium layer and polarized in a first direction; and a lower PZT layer chemically bonded on a lower surface of the titanium layer and polarized in a second direction opposite to the first direction. The titanium layer includes an interconnecting member and titanium members interconnected to each other by the interconnecting member forming a single titanium plate comb having teeth corresponding to the titanium members extending from two sides of the interconnecting member.

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Yokohama, Japan

Yoko Ohba