Piezoelectric element, liquid jetting head, and method for manufacturing thereof
US7083269B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2003 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Feb 21, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention provides a piezoelectric element having consistently high piezoelectric characteristics, and a liquid jetting head in which this element is used. A bottom electrode 42 (which contains Ir), a Ti layer of no less than 4 nm and no more than 6 nm, a piezoelectric thin film 43, and a top electrode 44 are sequentially layered on a ZrO2 film 32. The piezoelectric thin film 43 has the degree of orientation in the 100 plane, as measured by the X-ray diffraction wide angle technique, is 70% or greater, the degree of orientation in the 110 plane is 10% or less, and the degree of orientation in the 111 plane constitutes the remaining balance. Such piezoelectric thin film 43 can be obtained stably with good reproducibility by keeping the humidity of the environment for forming the piezoelectric thin film at 30% Rh or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.