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US 5,594,292 AGranted
Piezoelectric device
AssigneeNGK Insulators, Ltd.
InventorsYukihisa Takeuchi, Koji Kimura, Mitsuru Kurashina
Life of this patent
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Abstract
A piezoelectric device includes a ceramic substrate having at least one cavity defined by a thin-walled region of the substrate. The thin-walled region has an outer surface provided with at least one piezoelectric transducer and also with a non-operative portion situated adjacent to the piezoelectric transducer such that each piezoelectric transducer surrounds the non-operative portion, or two piezoelectric transducers are arranged on both sides of the non-operative portion.
Claims14
A piezoelectric device, comprising:
- a ceramic substrate having a cavity partially defined by a thin-walled region, said thin-walled region having an outer surface;
- at least one piezoelectric transducer provided on the thin-walled region;
- and
- an inactive portion provided on the thin-walled region and adjacent the at least one piezoelectric transducer, wherein in at least one cross-section through the cavity the at least one piezoelectric transducer forms first and second piezoelectric portions spaced apart from each other such that the inactive portion is positioned therebetween.
1 more element
Dependencies are inferred from the claim text.