Invention Grant
- Patent Title: Liquid ejecting head, liquid ejecting apparatus, and actuator
- Patent Title (中): 液体喷头,液体喷射装置和致动器
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Application No.: US12413398Application Date: 2009-03-27
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Publication No.: US08128208B2Publication Date: 2012-03-06
- Inventor: Masato Shimada
- Applicant: Masato Shimada
- Applicant Address: JP Tokyo
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP Tokyo
- Agency: Kilpatrick Townsend & Stockton LLP
- Priority: JP2008-082879 20080327; JP2009-006327 20090115
- Main IPC: B41J2/045
- IPC: B41J2/045

Abstract:
A liquid ejecting head includes a flow passage forming substrate that includes a plurality of pressure generating chambers juxtaposed to each other and each in communication with a nozzle for ejecting droplets, and piezoelectric elements disposed on the flow passage forming substrate with a diaphragm interposed therebetween. The piezoelectric elements include a lower electrode, a piezoelectric layer, and an upper electrode. The piezoelectric layer tapers downward at its ends. The lower electrode has a width smaller than the width of each of the pressure generating chambers. The piezoelectric layer has a larger width than the lower electrode to cover end faces of the lower electrode. The diaphragm has a top layer formed of a titanium oxide (TiOx) insulator film. The lower electrode has a top layer formed of a lanthanum nickel oxide (LaNiyOx) orientation control layer. The orientation control layer and at least part of the piezoelectric layer disposed on the orientation control layer are formed of perovskite crystals having a (111) preferred orientation.
Public/Granted literature
- US20090244208A1 LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND ACTUATOR Public/Granted day:2009-10-01
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