Piezoelectric diaphragm and piezoelectric electroacoustic...

Details Piezoelectric diaphragm and piezoelectric electroacoustic... Piezoelectric diaphragm and piezoelectric electroacoustic...

2006-06-27

2006-06-27

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S340000, C310S344000, C310S348000

Reexamination Certificate

active

07067959

ABSTRACT:
A piezoelectric diaphragm has principal-surface electrodes formed on upper and lower principal surfaces of a multilayer ceramic body. An internal electrode is disposed in an interface between adjacent piezoelectric ceramic layers. The upper and lower principal surfaces of the multilayer ceramic body are substantially entirely covered with a resin layer. A first cutout is formed in a side-edge portion, along the first side surface electrode, of the upper resin layer such that the upper principal-surface electrode is partially exposed in the first cutout. A second cutout is formed in a side-edge portion, along the first side surface electrode, of the lower resin layer such that the lower principal-surface electrode is partially exposed in the second cutout. The locations of the first and second cutouts formed in the upper and lower resin layers, respectively, are selected such that they do not oppose each other.

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Official Communication dated Oct. 12, 2005, issued in the corresponding German Application No. 103 54 026.1-35 (with full English translation).

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