Patent ID: 7042136

Claim:
A piezoelectric thin-film element comprising; a first unit laminated body composed of a first piezoelectric thin-film having a first surface and a second surface opposed each other, a first electrode metal film on said first surface and a second electrode film on said second surface, and a second unit laminated body composed of a second piezoelectric thin-film having a third surface and a fourth surface opposed each other, a third electrode metal film on said third surface and a fourth electrode film on said fourth surface, said first unit laminated body and said second unit laminated body being bonded to each other, with said second electrode metal film and said third electrode metal film opposite to each other, wherein said first unit laminated body has a first electrode separation surface between said first electrode metal film and said second electrode metal film, said first electrode separation surface being parallel to said first surface, wherein said second unit laminated body has a second electrode separation surface between said third electrode metal film and said fourth electrode metal film, said second electrode separation surface being parallel to said first surface.