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AssigneeToshiba Tec Kabushiki Kaisha
InventorsShuhei Yokoyama, Ryutaro Kusunoki, Chiaki Tanuma, Ryuichi Arai
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According to an embodiment, an inkjet head includes a nozzle from which ink is ejected, an ink pressure chamber, an oscillating plate, a first electrode, a piezoelectric layer, a second electrode, and a passivation layer. The ink pressure chamber is provided in the inkjet head to supply ink to the nozzle. The oscillating plate is formed to surround the nozzle. The first electrode is formed to surround the nozzle and to be in contact with the first oscillating plate. The piezoelectric layer is configured to surround the nozzle and to be in contact with the first electrode. The second electrode is formed to surround the nozzle and to be in contact with the piezoelectric layer. The passivation layer is formed to surround the nozzle and to be in contact with the first electrode, the second electrode, or the first oscillating plate.
An inkjet head, comprising:
A method of manufacturing an inkjet head, comprising:
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Structure thereof only for on-demand ink jet heads: structure of print heads with piezoelectric elements
Production of nozzles: coating the nozzle area or the ink chamber
Production of nozzles: production of print heads with piezoelectric elements
Manufacturing processes: bonding and adhesion
About 6 years 4 months of term left · ends 26 Feb 2033 (estimated)
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This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2012-39615 filed on Feb. 27, 2012, the entire contents of which are incorporated herein by reference.
Embodiments described herein relate generally to an inkjet head that ejects ink from nozzles and forms an image on recording media and a method of manufacturing the inkjet head.
There is known an on-demand type inkjet recording system for ejecting ink droplets from nozzles according to an image signal and forming an image with the ink droplets on a recording paper. The on-demand type inkjet recording system mainly includes a heat generating element type head and a piezoelectric element type head. The heat generating element type head is constituted to energize a heat generating element provided in an ink channel to generate air bubbles in ink and eject the ink pushed by the air bubbles from nozzles. The piezoelectric element type head is constituted to eject ink stored in an ink chamber from nozzles by utilizing deformation of a piezoelectric element.
FIG. 1 is an exploded perspective view illustrating an inkjet head in case that ink in an ink supply path 402 is not circulated according to a first embodiment;
FIG. 2 is an exploded perspective view illustrating the inkjet head in case that ink in the ink supply path 406 is circulated according to the first embodiment;
FIG. 3 is a plan view of the inkjet head according to the first embodiment;
According to an embodiment, an inkjet head includes a nozzle through which ink is ejected, an ink pressure chamber for supplying ink to the nozzle, an oscillating plate surrounding the nozzle, a first electrode, surrounding the nozzle, which is in contact with the first oscillating plate, a piezoelectric layer, surrounding the nozzle, which is in contact with the first electrode, a second electrode, surrounding the nozzle, which is in contact with the piezoelectric layer, and a passivation layer, surrounding the nozzle, which is in contact with the first electrode, second electrode, or first oscillating plate.
Embodiments are explained below with reference to the accompanying drawings, in which same reference numerals are applied to similar structures in the drawings.
First Embodiment