Ink jet printer head and method for manufacturing the same
AssigneeToshiba Tec Kabushiki Kaisha
InventorsMasashi Shimosato, Isao Suzuki
Life of this patent
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Abstract
The present invention provides an ink jet printer head having a pressure chamber to jet ink by deformation of a piezoelectric member provided in the pressure chamber. The piezoelectric member has an electrode for applying electricity to the piezoelectric member. The present invention provides an insulation layer on the electrode formed by vapor deposition method, which has high adhesion and throwing power. Thus, a plurality of electrodes can be covered by the insulation layer even though these electrodes are not provided on the same plane. Accordingly, the ink jet printer head can be used for a long time in steady without deterioration of the piezoelectric member and the ink in case of using conductive ink like water ink.
Claims19
An ink jet printer head, comprising:
- a pressure chamber, at least part of which is formed out of piezoelectric member, to be supplied ink;
- a nozzle connecting the pressure chamber to outside;
- an electrode for applying voltage to the piezoelectric member;
- and
- an insulation layer covering the electrode, wherein said insulation layer includes a vapor deposited polymerized organic macromolecule material.
A method for manufacturing an ink jet printer head, comprising the steps of:
- forming a pressure chamber, at least part of which is formed out of piezoelectric member;
- forming an electrode for applying voltage to the piezoelectric member;
- and
- covering the electrode with an insulation layer comprising an organic macromolecule material by a vapor deposition polymerization method.
An ink jet printer head, comprising:
- means for receiving ink including a piezoelectric member;
- means for connecting said means for receiving ink to outside;
- means for applying voltage to the piezoelectric member;
- and
- means for insulating and covering the means for applying voltage including a vapor deposited polymerized organic macromolecule material.
Dependencies are inferred from the claim text.