Liquid ejection head and liquid ejecting apparatus
US11878525B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2022 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Mar 13, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/11
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A piezoelectric actuator includes, in a first direction in which pressure chambers are arranged side by side, an active portion in which a piezoelectric layer is sandwiched between a first electrode and a second electrode in a first area of a vibration plate corresponding to opposite ends of each pressure chamber and does not include the active portion in a second area of the vibration plate corresponding to a center of the pressure chamber. The vibration plate has, in the first direction, a thick-walled portion with a predetermined thickness in the first area and a thin-walled portion thinner than the thick-walled portion in the second area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.