Patent ID: 7170215
Filing Date: 2007-01-30
Classification: B41J,H03H,Y10T

Abstract:
1. An electronic component comprising at least one piezoelectric element including: a substrate; a piezoelectiic material layer supported directly or indirectly by the substrate; a first electrode arranged on a principal surface of the piezoelectric material layer; a second electrode arranged or the other surface of the piezoelectric material layer; wherein the piezoelectric material layer is sandwiched between the first electrode and the second electrode; wherein the plezocleotric material layer includes at least a first piezoelectric material area not supported by the substrate and a second piezoelectric material area, other than the first piezoelectric material area, in which the piezoelectric material layer is not supported by the substrate. wherein, in the piezoelectric material layer, the second electrode is formed at least on the other surface of the first piezoelectric material area and the second piezoelectric material area; wherein, in the piezoelectric material layer, the first electrode Is formed at least on the principal surface of the first piezoelectric material area; and wherein a part or an entirety of the second plezocleotric material area has a thickness smaller than that of the first plezocleotric material area; wherein the substrate does not include an oscillation space, and wherein a multilayer film of an inorganic substance constituting an acoustic mirror is present between the substrate and the second electrode.