Surface mounting type piezoelectric element

Details Surface mounting type piezoelectric element Surface mounting type piezoelectric element

1999-01-25

2000-07-25

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310348, H01L 41053, H03H 902

Patent

active

060939966

ABSTRACT:
A surface mounting type piezoelectric component includes an insulating substrate, an external electrode disposed on the insulating substrate, and a piezoelectric element including an electrode. The piezoelectric element is fixed to the insulating substrate and the electrode of the piezoelectric element is connected to the external electrode. A metal cap is fixed to the insulating substrate via an adhesive agent and covers the piezoelectric element. A glass transition temperature of the adhesive agent in a cured state is about 120 degrees centigrade or more. A difference between absolute values of a thermal-expansion-coefficient of the metal cap and of the insulating substrate is about 8 ppm/degrees centigrade or less.

REFERENCES:
patent: 4742182 (1988-05-01), Fuchs
patent: 5525855 (1996-06-01), Gotoh et al.
patent: 5808397 (1998-09-01), Kotani
patent: 5875099 (1999-02-01), Maesaka et al.
patent: 5889357 (1999-03-01), Yachi et al.
patent: 5942836 (1999-08-01), Yoshida et al.

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