Patent ID: 11895463
Assignee: FUJIFILM CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A piezoelectric element comprising:
a piezoelectric layer;
electrode layers formed on both sides of the piezoelectric layer; and
a protective layer laminated on a surface of the electrode layer opposite to a surface on a piezoelectric layer side,
wherein the piezoelectric element includes a conductive foil laminated on a surface of the protective layer opposite to the electrode layer,
the protective layer has a hole that penetrates from a surface to the electrode layer,
the conductive foil includes an opening portion at a position that overlaps with the hole of the protective layer in a surface direction,
the piezoelectric element includes a filling member consisting of a conductive material, which is formed on at least a part of a surface of the conductive foil from insides of the hole of the protective layer and an opening portion of the conductive foil and is electrically connected to the electrode layer and the conductive foil, and a covering member that covers at least a part of the filling member and the conductive foil,
the covering member has a through-hole at a position that does not overlap with the filling member in the surface direction, and
the piezoelectric element includes a conductive member, which is inserted into the through-hole of the covering member and electrically connected to the conductive foil.