Patent ID: 8476810

Claim:
A piezoelectric device comprising: a first substrate; a second substrate disposed opposite to the first substrate; a third substrate disposed between the first substrate and the second substrate, a part of the third substrate forming a piezoelectric oscillating piece having a piezoelectric oscillating electrode, and another part of the third substrate forming a frame that surrounds the piezoelectric oscillating piece; a first metal film that joins the first substrate and the frame; a second metal film that joins the second substrate and the frame; a resin portion provided at least at any one of positions between the first substrate and the first metal film, between the frame and the first metal film, between the second substrate and the second metal film, and between the frame and the second metal film, and a bump electrode that is formed on the first substrate, wherein the bump electrode has a resin projection projecting toward the third substrate and a bump conductive film covering the resin projection, and the piezoelectric oscillating electrode is electrically connected with the bump conductive film.