Patent ID: 7064401

Claim:
A thin film piezoelectric element comprising a structure and an insulating layer covering an outer periphery of said structure along a thickness of said structure, wherein: said structure comprises a first main electrode layer and a first opposite electrode layer, a first piezoelectric thin film disposed between said first main electrode layer and said first opposite electrode layer, a second main electrode layer and a second opposite electrode layer, and a second piezoelectric thin film disposed between said second main electrode layer and said second opposite electrode layer; said first piezoelectric thin film and said second piezoelectric thin film being coupled so that said first opposite electrode layer and said second opposite electrode layer are opposed to each other and are physically and electrically connected to each other; said first main electrode layer includes a first main electrode layer projection partially extending from said first piezoelectric thin film; a first opening is formed through said insulating layer and said first main electrode layer projection; and a first connection wiring for connecting said first main electrode layer projection and said second main electrode layer is disposed via said first opening.