Piezoelectric actuator, liquid ejection head, and liquid ejection apparatus
US8702197B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2012 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Apr 6, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2002/14241
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A piezoelectric actuator includes a vibrating plate having a base surface, a first electrode, a piezoelectric layer, and a second electrode which extends in a first direction. In the piezoelectric actuator, the second electrode has a first portion having a first width, a second portion having a second width which is smaller than the first width, and a third portion which connects the first portion and the second portion, the first electrode has a first side which forms an outer circumference of the first electrode on a plan view, and the third portion of the second electrode is arranged at an upper side of the first side of the first electrode and a third width of the third portion is made narrower from the first portion toward the second portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.