Piezoelectric actuator and ink-jet head, and ink-jet recorder

Details Piezoelectric actuator and ink-jet head, and ink-jet recorder Piezoelectric actuator and ink-jet head, and ink-jet recorder

2007-09-04

2007-09-04

Meier, Stephen (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

10497348

ABSTRACT:
A piezoelectric actuator is constructed by forming a common electrode27of Cr, a piezoelectric layer29of Pb(Zr,Ti)O3, a cover layer31of BaTiO3, and an individual electrode33of Pt in this order into a laminate. The thickness of the piezoelectric layer29in the lamination direction (T1) and the thickness of the cover layer31in the lamination direction (T2) satisfy the relationship of 0.08≦T2/T1≦1. The relative dielectric constant of the piezoelectric layer29(εr1) and the relative dielectric constant of the cover layer31(εr2) satisfy the relationship of εr2/εr1≧0.2.

REFERENCES:
patent: 6142615 (2000-11-01), Qiu et al.
patent: 11-112048 (1999-04-01), None
patent: 2000-351212 (2000-12-01), None
patent: 2001-210888 (2001-08-01), None
International Search Report for PCT/JP03/00187 mailed Apr. 22, 2003; ISA/JPO.

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