Harness, Dickey & Pierce, P.L.C.
Piezoelectric actuator and ink-jet head, and ink-jet recorder
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. 
Matsushita Electric Industrial Co., Ltd.
B H B
B41J H01L B41J
additional inventional inventional
Shintaro Takanori Shogo Masakazu Masaichiro Hiroyuki Kazuo
Hara Nakano Matsubara Tanahashi Tatekawa Matsuo Nishimura