Piezoelectric sensor and method for manufacturing the same

A piezoelectric sensor, comprising:

• a first electrode-supporting portion supporting a signal electrode on a first insulator;
• a second electrode-supporting portion supporting a ground electrode on a second insulator;
• and
• a piezoelectric body made of a polymeric material disposed between the first electrode-supporting portion and the second electrode-supporting portion, wherein
• the first electrode-supporting portion and the second electrode-supporting portion are arranged so that the signal electrode and the ground electrode overlap each other in a layering direction,
• the signal electrode is supported at a side of the piezoelectric body of the first insulator, and
• the ground electrode is supported at a side of the piezoelectric body of the second insulator.

A method for manufacturing the piezoelectric sensor, comprising:

• a process for preparing a piezoelectric body made of a polymeric material;
• a first supporting process for supporting the signal electrode on one side of a first insulating film to manufacture the first electrode-supporting layer;
• a second supporting process for supporting the ground electrode on one side of a second insulating film to manufacture the second electrode-supporting layer;
• and
• a layering process for layering the first electrode-supporting layer on one side of the piezoelectric body made of a polymeric material and layering the second electrode-supporting layer on the other side of the piezoelectric body so that the signal electrode and the ground electrode are provided at the side of the piezoelectric body.