Ink jet head with partially exposed inside electrode and fabrication method thereof
AssigneeSharp Kabushiki Kaisha
InventorsKaoru Higuchi, Yasuhiro Sakamoto, Hirotsugu Matoba, Shigeaki Kakiwaki, Hitoshi Isono, Yoshinori Nakajima
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Abstract
In a droplet spray apparatus spraying out ink from an ink path by altering the volume of an ink channel formed in a trench that is covered with a cover plate and that has a conductive member provided at one end formed at a piezoelectric member, an ink supply opening to supply ink is provided at the end side where the conductive member is provided. Accordingly, an ink jet head that can be made compact, fabricated easily, and superior in productivity is obtained.
Claims19
An ink jet head deforming a pair of partition walls sandwiching an ink chamber trench to discharge ink from said ink chamber by having an inside electrode formed in the ink chamber at each inner side plane of said pair of partition walls and electrically connected to an external drive circuit, and applying a driving pulse from said external drive circuit to said inside electrodes, comprising:
- a substrate having said partition walls constituted by forming said ink chamber trench from one end plane to another end plane;
- and
- a filling member formed between said pair of partition walls at said another end plane of said ink chamber trench,
- wherein an end plane of said inside electrode located only within said ink chamber trench is exposed at said another end plane, said external drive circuit is electrically connected to said inside electrode at said another end plane, and an ink supply opening to supply ink to said ink chamber trench is provided at said another end plane side, and
- wherein said ink chamber trench extends from said one end plane to said another plane and maintains a constant depth.
Dependencies are inferred from the claim text.