Surface-acoustic-wave device

Details Surface-acoustic-wave device Surface-acoustic-wave device

1999-02-01

2000-11-21

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310340, 310344, 310348, H03H 925

Patent

active

061507482

ABSTRACT:
The surface-acoustic-wave device has surface-acoustic-wave element 1 provided with interdigital electrodes 2, shut-off member 32 and ground patterns 35-1, 35-2. Interdigital electrodes 2 are formed on a first surface of surface-acoustic-wave element 1 and covered with protective film 33. Surface-acoustic-wave element 1 is mechanically supported above mounting substrate 36. Shut-off member 32 serves to shut off surface-acoustic-wave element 1 electrically and airtightly from an ambience. The ground patterns 35-1, 35-2, grounded electrically, serve to discharge an electric charge. Ground patterns 35-1, 35-2 contact a surface of mounting substrate 36. Shut-off member 32 covers surface-acoustic-wave element 1 and also is connected with ground patterns 35-1, 35-2 that are in contact with the surface of mounting substrate 36.

REFERENCES:
patent: 5459368 (1995-10-01), Onishi et al.
patent: 5699027 (1997-12-01), Tsuji et al.
patent: 5712523 (1998-01-01), Nakashima et al.
patent: 5818145 (1998-10-01), Fukiharu
patent: 5821665 (1998-10-01), Onishi et al.
patent: 5939817 (1999-08-01), Takado
patent: 5991989 (1999-11-01), Onishi et al.
patent: 6033852 (2000-03-01), Andle et al.

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