Piezoelectric liquid ejection device with electrodes formed on partition wall surfaces
US9796180B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2015 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | May 1, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A liquid ejection device includes a piezoelectric transducer having a plurality of pressure chambers, a plurality of partitions dividing the plurality of pressure chambers, and a plurality of electrodes formed in the plurality of pressure chambers, respectively. The plurality of partitions each includes a first side wall and a second side wall that is positioned on a back surface side of the first side wall. The first side wall includes a first wall surface positioned at an upper portion thereof, the first wall surface being positioned so as to be set back in a normal direction from a second wall surface positioned below the first wall surface. A first electrode is formed on the second wall surface, and a second electrode is formed on the second side wall. An upper end of the second electrode is higher than an upper end of the first electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.