Piezoelectric actuator and ink-jet head, and ink-jet recorder
US7264340B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Jan 14, 2003 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Feb 11, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/03
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A piezoelectric actuator is constructed by forming a common electrode 27 of Cr, a piezoelectric layer 29 of Pb(Zr,Ti)O3, a cover layer 31 of BaTiO3, and an individual electrode 33 of Pt in this order into a laminate. The thickness of the piezoelectric layer 29 in the lamination direction (T1) and the thickness of the cover layer 31 in the lamination direction (T2) satisfy the relationship of 0.08≦T2/T1≦1. The relative dielectric constant of the piezoelectric layer 29 (εr1) and the relative dielectric constant of the cover layer 31 (εr2) satisfy the relationship of εr2/εr1≧0.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.