Piezoelectric device and method for manufacturing piezoelectric device
AssigneeMurata Manufacturing Co., Ltd.
InventorShinsuke Tani
Life of this patent
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Abstract
A piezoelectric device that includes a sintered body in which a first conductor portion and a second conductor portion are disposed on both principal surfaces of a piezoelectric ceramic base body. The first conductor portion includes conductive films having a predetermined pattern. An insulating film is formed on the principal surface of the piezoelectric ceramic base body on which the conductive films are disposed such that portions of the conductive films are exposed therethrough. The insulating film has a malleability equal to or greater than that of the conductive films.
Claims20
A piezoelectric device comprising:
- a sintered body having:
- a piezoelectric ceramic base body with first and second principal surfaces;
- a first conductor on the first principal surface, the first conductor including a plurality of conductive films having a predetermined pattern, the plurality of conductive films being separate from each other, and each of the plurality of conductive films being on the first principal surface of the piezoelectric ceramic base body;
- and
- a single second conductor on the second principal surface;
- and
- an insulating film on the first principal surface of the piezoelectric ceramic base body and disposed such that at least portions of the plurality of conductive films are exposed therethrough,
- wherein the insulating film has a malleability equal to or greater than that of the plurality of conductive films.
A method for manufacturing a piezoelectric device, the method comprising:
- firing a body that includes a piezoelectric ceramic sheet having first and second main surfaces, a first conductive material on the first main surface and a second conductive material on the second main surface to form a sintered body having a piezoelectric ceramic base body with a first principal surface and a second principal surface, a first conductor portion on the first principal surface and a single second conductor portion on the second principal surface;
- patterning the first conductor portion into a plurality of conductive films, the plurality of conductive films being separate from each other, and each of the plurality of conductive films being on the first principal surface of the piezoelectric ceramic base body;
- and
- applying an insulating material onto the piezoelectric ceramic base body such that at least portions of the plurality of conductive films are exposed therethrough so as to form an insulating film, the insulating film having a malleability equal to or greater than that of the plurality of conductive films.
Dependencies are inferred from the claim text.