US9033472B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9033472-B2 |
| Application number | US-201313789019-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 7, 2013 |
| Priority date | Dec 21, 2012 |
| Publication date | May 19, 2015 |
| Grant date | May 19, 2015 |
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Official abstract text for this publication.
A piezoelectric actuator includes upper and lower electrodes providing driving voltages and a piezoelectric film formed between the upper and lower electrodes and providing a driving force to ink in a plurality of pressure chambers formed on an inkjet print head, respectively. The piezoelectric film may include a plurality of basin parts individually formed on respective tops of the plurality of pressure chambers and a large-area part connected to the plurality of basin parts, respectively, at one end of the plurality of basin parts and formed as a single body. The large-area part may include a groove formed on an extended line of a basin line partitioning the basin parts.
Opening claim text (preview).
What is claimed is: 1. A piezoelectric actuator comprising: upper electrodes, having a plurality of respective connection parts, and lower electrodes providing driving voltages, wherein each of the plurality of connection parts have a larger width than those of other parts of the upper electrodes, and the plurality of connection parts are disposed in different locations of the upper electrodes in a longitudinal direction; a piezoelectric film formed between the upper and lo…
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